./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX --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 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:05:24,256 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:05:24,345 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:05:24,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:05:24,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:05:24,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:05:24,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:05:24,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:05:24,384 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:05:24,385 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:05:24,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:05:24,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:05:24,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:05:24,388 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:05:24,388 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:05:24,389 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:05:24,389 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:05:24,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:05:24,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:05:24,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:05:24,391 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:05:24,396 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:05:24,396 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:05:24,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:05:24,397 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:05:24,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:05:24,398 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:05:24,398 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:05:24,399 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:05:24,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:05:24,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:05:24,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:05:24,404 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:05:24,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:05:24,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:05:24,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:05:24,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:05:24,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:05:24,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:05:24,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:05:24,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:05:24,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:05:24,408 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_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2024-11-08 18:05:24,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:05:24,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:05:24,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:05:24,819 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:05:24,820 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:05:24,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i Unable to find full path for "g++" [2024-11-08 18:05:27,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:05:27,799 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:05:27,799 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-11-08 18:05:27,829 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data/ee43aa10a/1473ae28129b44c399927345d6a7be63/FLAG2cff9cc34 [2024-11-08 18:05:27,859 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data/ee43aa10a/1473ae28129b44c399927345d6a7be63 [2024-11-08 18:05:27,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:05:27,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:05:27,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:05:27,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:05:27,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:05:27,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:05:27" (1/1) ... [2024-11-08 18:05:27,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abb1e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:27, skipping insertion in model container [2024-11-08 18:05:27,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:05:27" (1/1) ... [2024-11-08 18:05:27,960 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:05:28,666 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:28,666 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:28,667 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:28,668 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:28,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:05:28,785 ERROR L321 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) [2024-11-08 18:05:28,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@740c3ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:28, skipping insertion in model container [2024-11-08 18:05:28,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:05:28,787 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-08 18:05:28,789 INFO L158 Benchmark]: Toolchain (without parser) took 924.34ms. Allocated memory is still 155.2MB. Free memory was 114.7MB in the beginning and 95.3MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-08 18:05:28,790 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 155.2MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 18:05:28,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 918.74ms. Allocated memory is still 155.2MB. Free memory was 114.2MB in the beginning and 95.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-08 18:05:28,792 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 155.2MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 918.74ms. Allocated memory is still 155.2MB. Free memory was 114.2MB in the beginning and 95.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1031]: 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_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX --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 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:05:31,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:05:31,769 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-08 18:05:31,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:05:31,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:05:31,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:05:31,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:05:31,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:05:31,840 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:05:31,841 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:05:31,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:05:31,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:05:31,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:05:31,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:05:31,847 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:05:31,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:05:31,848 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:05:31,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:05:31,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:05:31,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:05:31,850 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:05:31,854 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:05:31,855 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:05:31,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:05:31,855 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:05:31,856 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-08 18:05:31,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:05:31,856 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-08 18:05:31,857 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:05:31,857 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:05:31,858 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:05:31,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:05:31,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:05:31,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:05:31,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:05:31,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:05:31,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:05:31,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:05:31,860 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-08 18:05:31,861 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-08 18:05:31,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:05:31,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:05:31,862 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:05:31,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:05:31,862 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_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2024-11-08 18:05:32,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:05:32,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:05:32,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:05:32,390 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:05:32,391 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:05:32,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i Unable to find full path for "g++" [2024-11-08 18:05:34,871 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:05:35,368 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:05:35,369 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-11-08 18:05:35,396 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data/3ee7fc1e9/96712b10745340428fab5b077feb0117/FLAG0203dbe6d [2024-11-08 18:05:35,421 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/data/3ee7fc1e9/96712b10745340428fab5b077feb0117 [2024-11-08 18:05:35,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:05:35,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:05:35,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:05:35,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:05:35,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:05:35,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:05:35" (1/1) ... [2024-11-08 18:05:35,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a523bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:35, skipping insertion in model container [2024-11-08 18:05:35,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:05:35" (1/1) ... [2024-11-08 18:05:35,538 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:05:36,274 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,275 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,276 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,277 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:05:36,398 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-08 18:05:36,450 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:05:36,539 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,540 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,541 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,542 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:05:36,584 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:05:36,666 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,667 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,669 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,670 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 18:05:36,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:05:36,823 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:05:36,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36 WrapperNode [2024-11-08 18:05:36,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:05:36,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:05:36,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:05:36,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:05:36,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:36,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:36,964 INFO L138 Inliner]: procedures = 274, calls = 95, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 177 [2024-11-08 18:05:36,964 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:05:36,965 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:05:36,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:05:36,966 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:05:36,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:36,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:36,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,038 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2024-11-08 18:05:37,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:05:37,083 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:05:37,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:05:37,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:05:37,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (1/1) ... [2024-11-08 18:05:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:05:37,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:37,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:05:37,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:05:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-08 18:05:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-08 18:05:37,213 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-08 18:05:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 18:05:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-08 18:05:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 18:05:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-08 18:05:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 18:05:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 18:05:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:05:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:05:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 18:05:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:05:37,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:05:37,216 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:05:37,469 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:05:37,471 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:05:38,587 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:05:38,588 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:05:40,916 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:05:40,916 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:05:40,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:05:40 BoogieIcfgContainer [2024-11-08 18:05:40,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:05:40,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:05:40,921 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:05:40,925 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:05:40,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:05:35" (1/3) ... [2024-11-08 18:05:40,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a578d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:05:40, skipping insertion in model container [2024-11-08 18:05:40,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:05:36" (2/3) ... [2024-11-08 18:05:40,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a578d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:05:40, skipping insertion in model container [2024-11-08 18:05:40,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:05:40" (3/3) ... [2024-11-08 18:05:40,930 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_21-arrayloop2_nr.i [2024-11-08 18:05:40,951 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:05:40,951 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2024-11-08 18:05:40,951 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:05:41,096 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-08 18:05:41,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 101 transitions, 210 flow [2024-11-08 18:05:41,233 INFO L124 PetriNetUnfolderBase]: 12/99 cut-off events. [2024-11-08 18:05:41,234 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:05:41,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 12/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 357 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2024-11-08 18:05:41,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 101 transitions, 210 flow [2024-11-08 18:05:41,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 99 transitions, 204 flow [2024-11-08 18:05:41,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:05:41,264 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@a927f57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:05:41,265 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-08 18:05:41,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:05:41,281 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-11-08 18:05:41,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:05:41,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:41,282 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:05:41,283 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:41,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash 15188518, now seen corresponding path program 1 times [2024-11-08 18:05:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:41,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394034099] [2024-11-08 18:05:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:41,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:41,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:05:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:41,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 18:05:41,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:41,878 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:41,879 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:41,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394034099] [2024-11-08 18:05:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394034099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:41,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:41,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:05:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80773131] [2024-11-08 18:05:41,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:41,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:05:41,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:05:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:05:42,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-08 18:05:42,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:42,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:42,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-08 18:05:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:42,883 INFO L124 PetriNetUnfolderBase]: 407/889 cut-off events. [2024-11-08 18:05:42,883 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 18:05:42,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 889 events. 407/889 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5200 event pairs, 287 based on Foata normal form. 1/721 useless extension candidates. Maximal degree in co-relation 1459. Up to 606 conditions per place. [2024-11-08 18:05:42,904 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 32 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2024-11-08 18:05:42,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 266 flow [2024-11-08 18:05:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:05:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:05:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-11-08 18:05:42,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7103960396039604 [2024-11-08 18:05:42,927 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 204 flow. Second operand 4 states and 287 transitions. [2024-11-08 18:05:42,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 266 flow [2024-11-08 18:05:42,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:05:42,941 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 200 flow [2024-11-08 18:05:42,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-08 18:05:42,950 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -3 predicate places. [2024-11-08 18:05:42,951 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 200 flow [2024-11-08 18:05:42,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:42,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:42,952 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:05:42,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:05:43,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:43,161 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:43,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash 15188519, now seen corresponding path program 1 times [2024-11-08 18:05:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:43,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943541410] [2024-11-08 18:05:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:43,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:43,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:43,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:05:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:43,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 18:05:43,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:43,670 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:43,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:43,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943541410] [2024-11-08 18:05:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943541410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:43,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:05:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276092667] [2024-11-08 18:05:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:43,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:05:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:05:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:05:44,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-08 18:05:44,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:44,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:44,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-08 18:05:44,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:44,664 INFO L124 PetriNetUnfolderBase]: 409/898 cut-off events. [2024-11-08 18:05:44,664 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 18:05:44,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1539 conditions, 898 events. 409/898 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5103 event pairs, 287 based on Foata normal form. 4/734 useless extension candidates. Maximal degree in co-relation 1507. Up to 613 conditions per place. [2024-11-08 18:05:44,672 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 38 selfloop transitions, 5 changer transitions 0/99 dead transitions. [2024-11-08 18:05:44,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 99 transitions, 298 flow [2024-11-08 18:05:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:05:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:05:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 295 transitions. [2024-11-08 18:05:44,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7301980198019802 [2024-11-08 18:05:44,676 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 200 flow. Second operand 4 states and 295 transitions. [2024-11-08 18:05:44,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 99 transitions, 298 flow [2024-11-08 18:05:44,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 288 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:05:44,681 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 235 flow [2024-11-08 18:05:44,682 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-11-08 18:05:44,683 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -1 predicate places. [2024-11-08 18:05:44,683 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 235 flow [2024-11-08 18:05:44,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:44,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:44,684 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:44,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:05:44,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:44,885 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:44,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash -433948166, now seen corresponding path program 1 times [2024-11-08 18:05:44,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:44,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89933325] [2024-11-08 18:05:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:44,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:44,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:44,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:05:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:45,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 18:05:45,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:45,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:05:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:45,283 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:45,283 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89933325] [2024-11-08 18:05:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89933325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:05:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932525182] [2024-11-08 18:05:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:45,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:05:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:05:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:05:45,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 101 [2024-11-08 18:05:45,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:45,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:45,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 101 [2024-11-08 18:05:45,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:45,810 INFO L124 PetriNetUnfolderBase]: 409/897 cut-off events. [2024-11-08 18:05:45,811 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-08 18:05:45,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 897 events. 409/897 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5095 event pairs, 287 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 1512. Up to 607 conditions per place. [2024-11-08 18:05:45,819 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 34 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2024-11-08 18:05:45,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 98 transitions, 307 flow [2024-11-08 18:05:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:05:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:05:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2024-11-08 18:05:45,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7755775577557755 [2024-11-08 18:05:45,821 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 235 flow. Second operand 3 states and 235 transitions. [2024-11-08 18:05:45,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 98 transitions, 307 flow [2024-11-08 18:05:45,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 98 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:05:45,828 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 236 flow [2024-11-08 18:05:45,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-11-08 18:05:45,831 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -1 predicate places. [2024-11-08 18:05:45,831 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 236 flow [2024-11-08 18:05:45,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:45,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:45,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:45,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:05:46,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:46,037 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:46,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash -433948167, now seen corresponding path program 1 times [2024-11-08 18:05:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130680191] [2024-11-08 18:05:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:46,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:46,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:05:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:46,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 18:05:46,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:46,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 18:05:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:46,375 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:46,376 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130680191] [2024-11-08 18:05:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130680191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:46,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:46,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:05:46,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295602037] [2024-11-08 18:05:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:46,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:05:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:05:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:05:46,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 101 [2024-11-08 18:05:46,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:46,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:46,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 101 [2024-11-08 18:05:46,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:46,848 INFO L124 PetriNetUnfolderBase]: 409/896 cut-off events. [2024-11-08 18:05:46,849 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-08 18:05:46,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 896 events. 409/896 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5133 event pairs, 287 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 1511. Up to 607 conditions per place. [2024-11-08 18:05:46,857 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 34 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2024-11-08 18:05:46,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 308 flow [2024-11-08 18:05:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:05:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:05:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2024-11-08 18:05:46,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7755775577557755 [2024-11-08 18:05:46,860 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 236 flow. Second operand 3 states and 235 transitions. [2024-11-08 18:05:46,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 308 flow [2024-11-08 18:05:46,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 97 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:05:46,864 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 234 flow [2024-11-08 18:05:46,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-11-08 18:05:46,866 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2024-11-08 18:05:46,867 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 234 flow [2024-11-08 18:05:46,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:46,867 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:46,867 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:46,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:05:47,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:47,068 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:47,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash -567490789, now seen corresponding path program 1 times [2024-11-08 18:05:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:47,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571224855] [2024-11-08 18:05:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:47,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:47,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:47,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:05:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:47,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 18:05:47,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:47,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 18:05:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:47,406 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:47,406 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571224855] [2024-11-08 18:05:47,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571224855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:47,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:47,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:05:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176531917] [2024-11-08 18:05:47,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:47,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:05:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:05:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:05:47,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 101 [2024-11-08 18:05:47,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:47,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:47,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 101 [2024-11-08 18:05:47,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:48,022 INFO L124 PetriNetUnfolderBase]: 409/894 cut-off events. [2024-11-08 18:05:48,022 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-08 18:05:48,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 894 events. 409/894 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5128 event pairs, 287 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 1511. Up to 607 conditions per place. [2024-11-08 18:05:48,030 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 32 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-08 18:05:48,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 95 transitions, 308 flow [2024-11-08 18:05:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:05:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:05:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2024-11-08 18:05:48,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6772277227722773 [2024-11-08 18:05:48,032 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 234 flow. Second operand 5 states and 342 transitions. [2024-11-08 18:05:48,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 95 transitions, 308 flow [2024-11-08 18:05:48,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 95 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:05:48,035 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 238 flow [2024-11-08 18:05:48,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2024-11-08 18:05:48,036 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2024-11-08 18:05:48,037 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 238 flow [2024-11-08 18:05:48,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:48,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:48,037 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:48,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:05:48,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:48,238 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:48,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash -567490788, now seen corresponding path program 1 times [2024-11-08 18:05:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:48,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645463840] [2024-11-08 18:05:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:48,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:48,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:48,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:05:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:48,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:05:48,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:48,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:05:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:48,617 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:48,617 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:48,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645463840] [2024-11-08 18:05:48,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645463840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:48,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:48,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:05:48,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237941791] [2024-11-08 18:05:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:48,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:05:48,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:05:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:05:48,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 101 [2024-11-08 18:05:48,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:48,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:48,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 101 [2024-11-08 18:05:48,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:49,268 INFO L124 PetriNetUnfolderBase]: 409/892 cut-off events. [2024-11-08 18:05:49,268 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-08 18:05:49,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549 conditions, 892 events. 409/892 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5118 event pairs, 287 based on Foata normal form. 2/729 useless extension candidates. Maximal degree in co-relation 1509. Up to 609 conditions per place. [2024-11-08 18:05:49,275 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 35 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2024-11-08 18:05:49,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 312 flow [2024-11-08 18:05:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:05:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:05:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2024-11-08 18:05:49,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7153465346534653 [2024-11-08 18:05:49,278 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 238 flow. Second operand 4 states and 289 transitions. [2024-11-08 18:05:49,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 312 flow [2024-11-08 18:05:49,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 298 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:05:49,281 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 228 flow [2024-11-08 18:05:49,281 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-11-08 18:05:49,282 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -5 predicate places. [2024-11-08 18:05:49,282 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 228 flow [2024-11-08 18:05:49,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:49,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:49,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:49,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:05:49,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:49,483 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:49,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:49,484 INFO L85 PathProgramCache]: Analyzing trace with hash -413689924, now seen corresponding path program 1 times [2024-11-08 18:05:49,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:49,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371863153] [2024-11-08 18:05:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:49,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:49,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:49,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:05:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:49,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 18:05:49,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:49,753 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:49,753 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:49,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371863153] [2024-11-08 18:05:49,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371863153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:49,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:49,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:05:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175983739] [2024-11-08 18:05:49,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:49,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:05:49,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:05:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:05:49,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 101 [2024-11-08 18:05:49,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:49,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:49,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 101 [2024-11-08 18:05:49,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:50,118 INFO L124 PetriNetUnfolderBase]: 407/909 cut-off events. [2024-11-08 18:05:50,118 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-08 18:05:50,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 909 events. 407/909 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5107 event pairs, 287 based on Foata normal form. 4/742 useless extension candidates. Maximal degree in co-relation 1539. Up to 609 conditions per place. [2024-11-08 18:05:50,127 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 40 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2024-11-08 18:05:50,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 97 transitions, 328 flow [2024-11-08 18:05:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:05:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:05:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2024-11-08 18:05:50,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7920792079207921 [2024-11-08 18:05:50,129 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 228 flow. Second operand 3 states and 240 transitions. [2024-11-08 18:05:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 97 transitions, 328 flow [2024-11-08 18:05:50,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 312 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 18:05:50,132 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 231 flow [2024-11-08 18:05:50,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-11-08 18:05:50,133 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -5 predicate places. [2024-11-08 18:05:50,133 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 231 flow [2024-11-08 18:05:50,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:50,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:50,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:50,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 18:05:50,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:50,335 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:50,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 102211581, now seen corresponding path program 1 times [2024-11-08 18:05:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566665379] [2024-11-08 18:05:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:50,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:50,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:50,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:50,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:05:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:50,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 18:05:50,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:50,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:05:50,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:05:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:50,950 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:50,950 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566665379] [2024-11-08 18:05:50,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566665379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:50,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:50,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:05:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863769687] [2024-11-08 18:05:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:50,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:05:50,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:50,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:05:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:05:51,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-08 18:05:51,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:51,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:51,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-08 18:05:51,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:52,008 INFO L124 PetriNetUnfolderBase]: 409/946 cut-off events. [2024-11-08 18:05:52,008 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-08 18:05:52,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 946 events. 409/946 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5518 event pairs, 287 based on Foata normal form. 2/766 useless extension candidates. Maximal degree in co-relation 1533. Up to 617 conditions per place. [2024-11-08 18:05:52,017 INFO L140 encePairwiseOnDemand]: 95/101 looper letters, 43 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-11-08 18:05:52,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 348 flow [2024-11-08 18:05:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:05:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:05:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 295 transitions. [2024-11-08 18:05:52,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7301980198019802 [2024-11-08 18:05:52,020 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 231 flow. Second operand 4 states and 295 transitions. [2024-11-08 18:05:52,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 348 flow [2024-11-08 18:05:52,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:05:52,024 INFO L231 Difference]: Finished difference. Result has 93 places, 97 transitions, 270 flow [2024-11-08 18:05:52,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=93, PETRI_TRANSITIONS=97} [2024-11-08 18:05:52,025 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -1 predicate places. [2024-11-08 18:05:52,025 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 97 transitions, 270 flow [2024-11-08 18:05:52,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:52,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:52,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:52,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 18:05:52,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:52,227 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:52,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash 102211580, now seen corresponding path program 1 times [2024-11-08 18:05:52,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:52,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190584659] [2024-11-08 18:05:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:52,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:52,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:52,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:52,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:05:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:52,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 18:05:52,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:52,760 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-08 18:05:52,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-08 18:05:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:52,817 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:52,817 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190584659] [2024-11-08 18:05:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190584659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:52,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:05:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999984506] [2024-11-08 18:05:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:52,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:05:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:05:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:05:53,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 101 [2024-11-08 18:05:53,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:53,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:53,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 101 [2024-11-08 18:05:53,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:53,417 INFO L124 PetriNetUnfolderBase]: 409/938 cut-off events. [2024-11-08 18:05:53,418 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-08 18:05:53,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 938 events. 409/938 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5418 event pairs, 287 based on Foata normal form. 4/763 useless extension candidates. Maximal degree in co-relation 1547. Up to 615 conditions per place. [2024-11-08 18:05:53,426 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 34 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-08 18:05:53,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 95 transitions, 348 flow [2024-11-08 18:05:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:05:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:05:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2024-11-08 18:05:53,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7202970297029703 [2024-11-08 18:05:53,429 INFO L175 Difference]: Start difference. First operand has 93 places, 97 transitions, 270 flow. Second operand 4 states and 291 transitions. [2024-11-08 18:05:53,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 95 transitions, 348 flow [2024-11-08 18:05:53,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:05:53,432 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 278 flow [2024-11-08 18:05:53,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2024-11-08 18:05:53,433 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -1 predicate places. [2024-11-08 18:05:53,433 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 278 flow [2024-11-08 18:05:53,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:53,434 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:53,434 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:53,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 18:05:53,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:53,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:53,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1126407749, now seen corresponding path program 1 times [2024-11-08 18:05:53,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:53,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848206019] [2024-11-08 18:05:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:53,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:05:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:53,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 18:05:54,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:54,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 18:05:54,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-08 18:05:54,305 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-08 18:05:54,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-08 18:05:54,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:54,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:54,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:54,502 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:54,502 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848206019] [2024-11-08 18:05:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848206019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:54,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 18:05:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459371056] [2024-11-08 18:05:54,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:54,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:05:54,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:05:54,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:05:56,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 101 [2024-11-08 18:05:56,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 278 flow. Second operand has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:56,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:56,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 101 [2024-11-08 18:05:56,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:57,636 INFO L124 PetriNetUnfolderBase]: 409/937 cut-off events. [2024-11-08 18:05:57,636 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-08 18:05:57,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 937 events. 409/937 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5423 event pairs, 287 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 1550. Up to 626 conditions per place. [2024-11-08 18:05:57,643 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 56 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2024-11-08 18:05:57,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 111 transitions, 452 flow [2024-11-08 18:05:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 18:05:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 18:05:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 606 transitions. [2024-11-08 18:05:57,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-08 18:05:57,647 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 278 flow. Second operand 11 states and 606 transitions. [2024-11-08 18:05:57,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 111 transitions, 452 flow [2024-11-08 18:05:57,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 436 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:05:57,653 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 322 flow [2024-11-08 18:05:57,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=322, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-11-08 18:05:57,655 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2024-11-08 18:05:57,656 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 322 flow [2024-11-08 18:05:57,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:05:57,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:57,658 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:57,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:05:57,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:57,859 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:05:57,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1126407748, now seen corresponding path program 1 times [2024-11-08 18:05:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:05:57,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935955591] [2024-11-08 18:05:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:57,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:57,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:57,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:05:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:58,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 18:05:58,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:58,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 18:05:58,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 18:05:58,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-08 18:05:58,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-08 18:05:58,702 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-08 18:05:58,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-08 18:05:58,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:05:58,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:58,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:58,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:58,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:58,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:58,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:05:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:05:59,044 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:05:59,044 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:05:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935955591] [2024-11-08 18:05:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935955591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 18:05:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445753507] [2024-11-08 18:05:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:59,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:05:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:05:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:05:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:06:01,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-11-08 18:06:01,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 322 flow. Second operand has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:01,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:01,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-11-08 18:06:01,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:02,816 INFO L124 PetriNetUnfolderBase]: 409/936 cut-off events. [2024-11-08 18:06:02,817 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 18:06:02,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 936 events. 409/936 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5438 event pairs, 287 based on Foata normal form. 1/773 useless extension candidates. Maximal degree in co-relation 1614. Up to 630 conditions per place. [2024-11-08 18:06:02,828 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 59 selfloop transitions, 10 changer transitions 0/111 dead transitions. [2024-11-08 18:06:02,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 111 transitions, 490 flow [2024-11-08 18:06:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:06:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:06:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 539 transitions. [2024-11-08 18:06:02,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5336633663366337 [2024-11-08 18:06:02,833 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 322 flow. Second operand 10 states and 539 transitions. [2024-11-08 18:06:02,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 111 transitions, 490 flow [2024-11-08 18:06:02,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 111 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:06:02,840 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 342 flow [2024-11-08 18:06:02,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=342, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2024-11-08 18:06:02,843 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 19 predicate places. [2024-11-08 18:06:02,843 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 342 flow [2024-11-08 18:06:02,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:02,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:02,845 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:02,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 18:06:03,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:03,046 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:03,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash -558901382, now seen corresponding path program 1 times [2024-11-08 18:06:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047826449] [2024-11-08 18:06:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:06:03,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:03,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:03,051 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:03,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:06:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:06:03,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 18:06:03,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:06:03,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:06:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:03,552 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:06:03,553 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:06:03,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047826449] [2024-11-08 18:06:03,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047826449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:06:03,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:06:03,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:06:03,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779123321] [2024-11-08 18:06:03,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:06:03,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:06:03,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:06:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:06:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:06:03,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 101 [2024-11-08 18:06:03,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 342 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:03,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:03,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 101 [2024-11-08 18:06:03,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:04,197 INFO L124 PetriNetUnfolderBase]: 409/928 cut-off events. [2024-11-08 18:06:04,198 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-08 18:06:04,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669 conditions, 928 events. 409/928 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5344 event pairs, 287 based on Foata normal form. 8/770 useless extension candidates. Maximal degree in co-relation 1590. Up to 608 conditions per place. [2024-11-08 18:06:04,208 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 35 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2024-11-08 18:06:04,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 426 flow [2024-11-08 18:06:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:06:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:06:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 295 transitions. [2024-11-08 18:06:04,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7301980198019802 [2024-11-08 18:06:04,211 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 342 flow. Second operand 4 states and 295 transitions. [2024-11-08 18:06:04,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 426 flow [2024-11-08 18:06:04,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 98 transitions, 406 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-08 18:06:04,215 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 336 flow [2024-11-08 18:06:04,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2024-11-08 18:06:04,216 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2024-11-08 18:06:04,216 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 336 flow [2024-11-08 18:06:04,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:04,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:04,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:04,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 18:06:04,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:04,418 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:04,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:04,419 INFO L85 PathProgramCache]: Analyzing trace with hash -558901383, now seen corresponding path program 1 times [2024-11-08 18:06:04,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:04,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451923824] [2024-11-08 18:06:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:06:04,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:04,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:04,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:04,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:06:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:06:04,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:06:04,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:06:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:04,762 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:06:04,762 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:06:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451923824] [2024-11-08 18:06:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451923824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:06:04,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:06:04,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:06:04,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605457588] [2024-11-08 18:06:04,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:06:04,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:06:04,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:06:04,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:06:04,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:06:04,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 101 [2024-11-08 18:06:04,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:04,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:04,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 101 [2024-11-08 18:06:04,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:05,483 INFO L124 PetriNetUnfolderBase]: 409/920 cut-off events. [2024-11-08 18:06:05,483 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-08 18:06:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1671 conditions, 920 events. 409/920 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5292 event pairs, 287 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 1595. Up to 608 conditions per place. [2024-11-08 18:06:05,495 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 37 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-08 18:06:05,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 96 transitions, 424 flow [2024-11-08 18:06:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:06:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:06:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2024-11-08 18:06:05,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7153465346534653 [2024-11-08 18:06:05,499 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 336 flow. Second operand 4 states and 289 transitions. [2024-11-08 18:06:05,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 96 transitions, 424 flow [2024-11-08 18:06:05,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:06:05,504 INFO L231 Difference]: Finished difference. Result has 103 places, 96 transitions, 332 flow [2024-11-08 18:06:05,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=103, PETRI_TRANSITIONS=96} [2024-11-08 18:06:05,506 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 9 predicate places. [2024-11-08 18:06:05,506 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 96 transitions, 332 flow [2024-11-08 18:06:05,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:05,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:05,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:05,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 18:06:05,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:05,708 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:05,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1746668067, now seen corresponding path program 1 times [2024-11-08 18:06:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813479085] [2024-11-08 18:06:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:06:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:05,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:05,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:06:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:06:06,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 18:06:06,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:06:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:06,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:06:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:06,203 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:06:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813479085] [2024-11-08 18:06:06,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813479085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:06:06,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:06:06,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-08 18:06:06,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284442384] [2024-11-08 18:06:06,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 18:06:06,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:06:06,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:06:06,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:06:06,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:06:06,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 101 [2024-11-08 18:06:06,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 96 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:06,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:06,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 101 [2024-11-08 18:06:06,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:06,803 INFO L124 PetriNetUnfolderBase]: 407/972 cut-off events. [2024-11-08 18:06:06,803 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-08 18:06:06,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 972 events. 407/972 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5302 event pairs, 287 based on Foata normal form. 12/822 useless extension candidates. Maximal degree in co-relation 1720. Up to 606 conditions per place. [2024-11-08 18:06:06,810 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 57 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-11-08 18:06:06,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 588 flow [2024-11-08 18:06:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:06:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:06:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 450 transitions. [2024-11-08 18:06:06,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7425742574257426 [2024-11-08 18:06:06,813 INFO L175 Difference]: Start difference. First operand has 103 places, 96 transitions, 332 flow. Second operand 6 states and 450 transitions. [2024-11-08 18:06:06,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 588 flow [2024-11-08 18:06:06,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 117 transitions, 546 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:06:06,817 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 388 flow [2024-11-08 18:06:06,817 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=388, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-11-08 18:06:06,818 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 15 predicate places. [2024-11-08 18:06:06,818 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 388 flow [2024-11-08 18:06:06,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:06,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:06,818 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:06,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 18:06:07,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:07,019 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:07,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2076818332, now seen corresponding path program 1 times [2024-11-08 18:06:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:07,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33181109] [2024-11-08 18:06:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:06:07,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:07,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:07,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:07,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 18:06:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:06:07,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 18:06:07,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:06:07,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 18:06:07,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 18:06:07,701 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-08 18:06:07,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2024-11-08 18:06:07,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-08 18:06:07,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-08 18:06:07,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-08 18:06:07,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2024-11-08 18:06:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:08,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:06:08,102 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-08 18:06:08,129 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-08 18:06:08,167 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_~p~0#1.base_49| (_ BitVec 32)) (v_ArrVal_570 (_ BitVec 1)) (v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_49|))) (= (bvadd (_ bv1 1) (select (store |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_49| v_ArrVal_570) (select (select (store |c_#memory_$Pointer$#0.base| |v_ULTIMATE.start_new_~p~0#1.base_49| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))) (_ bv0 1)))) is different from false [2024-11-08 18:06:08,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:08,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2024-11-08 18:06:08,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:08,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 55 [2024-11-08 18:06:08,258 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 20 treesize of output 14 [2024-11-08 18:06:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-08 18:06:18,815 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:06:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33181109] [2024-11-08 18:06:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33181109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:06:18,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:06:18,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-08 18:06:18,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977970931] [2024-11-08 18:06:18,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 18:06:18,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 18:06:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:06:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 18:06:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=173, Unknown=5, NotChecked=84, Total=306 [2024-11-08 18:06:18,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 101 [2024-11-08 18:06:18,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 388 flow. Second operand has 18 states, 18 states have (on average 22.944444444444443) internal successors, (413), 18 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:18,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:18,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 101 [2024-11-08 18:06:18,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:22,178 INFO L124 PetriNetUnfolderBase]: 1861/3193 cut-off events. [2024-11-08 18:06:22,178 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-08 18:06:22,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 3193 events. 1861/3193 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17992 event pairs, 1484 based on Foata normal form. 0/2180 useless extension candidates. Maximal degree in co-relation 6177. Up to 2797 conditions per place. [2024-11-08 18:06:22,208 INFO L140 encePairwiseOnDemand]: 93/101 looper letters, 69 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-11-08 18:06:22,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 111 transitions, 610 flow [2024-11-08 18:06:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 18:06:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 18:06:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-11-08 18:06:22,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27722772277227725 [2024-11-08 18:06:22,210 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 388 flow. Second operand 11 states and 308 transitions. [2024-11-08 18:06:22,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 111 transitions, 610 flow [2024-11-08 18:06:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 111 transitions, 594 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-08 18:06:22,216 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 457 flow [2024-11-08 18:06:22,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=457, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2024-11-08 18:06:22,217 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 27 predicate places. [2024-11-08 18:06:22,217 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 457 flow [2024-11-08 18:06:22,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.944444444444443) internal successors, (413), 18 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:22,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:22,218 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:22,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 18:06:22,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:22,418 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:22,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2076818333, now seen corresponding path program 1 times [2024-11-08 18:06:22,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:22,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885589743] [2024-11-08 18:06:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:06:22,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:22,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:22,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 18:06:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:06:22,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 18:06:22,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:06:22,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:06:23,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 18:06:23,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 18:06:23,497 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-08 18:06:23,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-08 18:06:23,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-08 18:06:23,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2024-11-08 18:06:23,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-08 18:06:23,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-08 18:06:23,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2024-11-08 18:06:23,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-08 18:06:23,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:06:23,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-11-08 18:06:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:23,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:06:24,169 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-08 18:06:24,242 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-08 18:06:24,347 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((|v_ULTIMATE.start_new_~p~0#1.base_52| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_52|))) (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |v_ULTIMATE.start_new_~p~0#1.base_52| v_ArrVal_679) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))))) (forall ((|v_ULTIMATE.start_new_~p~0#1.base_52| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_52|))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_674 (_ BitVec 32)) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |v_ULTIMATE.start_new_~p~0#1.base_52| v_ArrVal_679) |c_~#c~0.base|) .cse1)) (select (store |c_#length| |v_ULTIMATE.start_new_~p~0#1.base_52| v_ArrVal_674) (select (select (store |c_#memory_$Pointer$#0.base| |v_ULTIMATE.start_new_~p~0#1.base_52| v_ArrVal_680) |c_~#c~0.base|) .cse1)))))))) is different from false [2024-11-08 18:06:24,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:24,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 45 treesize of output 38 [2024-11-08 18:06:24,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:24,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 60 treesize of output 55 [2024-11-08 18:06:24,478 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 23 treesize of output 11 [2024-11-08 18:06:24,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:24,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 48 treesize of output 49 [2024-11-08 18:06:24,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:24,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 40 treesize of output 41 [2024-11-08 18:06:24,633 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 18:06:24,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:24,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 41 [2024-11-08 18:06:24,679 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 18:06:24,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:06:24,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 30 [2024-11-08 18:06:26,943 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2024-11-08 18:06:26,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2024-11-08 18:06:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-08 18:06:27,196 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:06:27,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885589743] [2024-11-08 18:06:27,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885589743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:06:27,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:06:27,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-08 18:06:27,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353953227] [2024-11-08 18:06:27,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 18:06:27,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 18:06:27,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:06:27,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 18:06:27,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=233, Unknown=3, NotChecked=96, Total=380 [2024-11-08 18:06:27,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 101 [2024-11-08 18:06:27,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 457 flow. Second operand has 20 states, 20 states have (on average 16.75) internal successors, (335), 20 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:27,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:27,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 101 [2024-11-08 18:06:27,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:33,237 INFO L124 PetriNetUnfolderBase]: 2608/4074 cut-off events. [2024-11-08 18:06:33,237 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-08 18:06:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 4074 events. 2608/4074 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21226 event pairs, 2159 based on Foata normal form. 6/2387 useless extension candidates. Maximal degree in co-relation 8270. Up to 3946 conditions per place. [2024-11-08 18:06:33,272 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 72 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-11-08 18:06:33,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 110 transitions, 665 flow [2024-11-08 18:06:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:06:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:06:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 277 transitions. [2024-11-08 18:06:33,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.21096725057121096 [2024-11-08 18:06:33,277 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 457 flow. Second operand 13 states and 277 transitions. [2024-11-08 18:06:33,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 110 transitions, 665 flow [2024-11-08 18:06:33,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 110 transitions, 649 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-08 18:06:33,282 INFO L231 Difference]: Finished difference. Result has 133 places, 107 transitions, 505 flow [2024-11-08 18:06:33,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=505, PETRI_PLACES=133, PETRI_TRANSITIONS=107} [2024-11-08 18:06:33,283 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 39 predicate places. [2024-11-08 18:06:33,283 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 107 transitions, 505 flow [2024-11-08 18:06:33,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.75) internal successors, (335), 20 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:33,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:33,284 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:33,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 18:06:33,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:33,484 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:33,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1343000768, now seen corresponding path program 2 times [2024-11-08 18:06:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:33,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191581198] [2024-11-08 18:06:33,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:06:33,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:33,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:33,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:33,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 18:06:34,104 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:06:34,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:06:34,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:06:34,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:06:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:34,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:06:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:06:34,537 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 18:06:34,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191581198] [2024-11-08 18:06:34,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191581198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:06:34,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:06:34,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-08 18:06:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911018935] [2024-11-08 18:06:34,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 18:06:34,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:06:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 18:06:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:06:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:06:34,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 101 [2024-11-08 18:06:34,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 107 transitions, 505 flow. Second operand has 12 states, 12 states have (on average 69.66666666666667) internal successors, (836), 12 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:34,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:06:34,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 101 [2024-11-08 18:06:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:06:36,363 INFO L124 PetriNetUnfolderBase]: 407/1092 cut-off events. [2024-11-08 18:06:36,363 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2024-11-08 18:06:36,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 1092 events. 407/1092 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5276 event pairs, 287 based on Foata normal form. 12/949 useless extension candidates. Maximal degree in co-relation 2309. Up to 606 conditions per place. [2024-11-08 18:06:36,373 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 93 selfloop transitions, 23 changer transitions 0/168 dead transitions. [2024-11-08 18:06:36,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 1273 flow [2024-11-08 18:06:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:06:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:06:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 876 transitions. [2024-11-08 18:06:36,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7227722772277227 [2024-11-08 18:06:36,378 INFO L175 Difference]: Start difference. First operand has 133 places, 107 transitions, 505 flow. Second operand 12 states and 876 transitions. [2024-11-08 18:06:36,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 1273 flow [2024-11-08 18:06:36,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 168 transitions, 1123 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-08 18:06:36,388 INFO L231 Difference]: Finished difference. Result has 141 places, 120 transitions, 699 flow [2024-11-08 18:06:36,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=699, PETRI_PLACES=141, PETRI_TRANSITIONS=120} [2024-11-08 18:06:36,389 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 47 predicate places. [2024-11-08 18:06:36,389 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 120 transitions, 699 flow [2024-11-08 18:06:36,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.66666666666667) internal successors, (836), 12 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:06:36,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:06:36,390 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:06:36,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 18:06:36,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:36,591 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-08 18:06:36,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:06:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash -904386362, now seen corresponding path program 3 times [2024-11-08 18:06:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 18:06:36,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696930223] [2024-11-08 18:06:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:06:36,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:06:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:06:36,595 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:06:36,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93fe15e3-7a18-4fb4-9fb5-cce1f215b279/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process