./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:00:46,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:00:46,740 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:00:46,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:00:46,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:00:46,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:00:46,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:00:46,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:00:46,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:00:46,775 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:00:46,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:00:46,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:00:46,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:00:46,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:00:46,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:00:46,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:00:46,780 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:00:46,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:00:46,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:00:46,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:00:46,782 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:00:46,783 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:00:46,783 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:00:46,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:00:46,784 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:00:46,785 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:00:46,785 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:00:46,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:00:46,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:00:46,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:00:46,787 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:00:46,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:00:46,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:46,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:00:46,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:00:46,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:00:46,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:00:46,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:00:46,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:00:46,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:00:46,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:00:46,791 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_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 [2023-11-24 22:00:47,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:00:47,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:00:47,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:00:47,093 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:00:47,094 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:00:47,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2023-11-24 22:00:50,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:00:50,658 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:00:50,659 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2023-11-24 22:00:50,678 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data/34d1f03a7/7588679303614d19aa3ad29d5aa95a8a/FLAGabc71af91 [2023-11-24 22:00:50,694 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data/34d1f03a7/7588679303614d19aa3ad29d5aa95a8a [2023-11-24 22:00:50,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:00:50,699 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:00:50,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:50,701 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:00:50,707 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:00:50,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:50" (1/1) ... [2023-11-24 22:00:50,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231d377a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:50, skipping insertion in model container [2023-11-24 22:00:50,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:50" (1/1) ... [2023-11-24 22:00:50,784 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:00:51,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:51,355 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-24 22:00:51,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64c0263a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:51, skipping insertion in model container [2023-11-24 22:00:51,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:51,357 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 22:00:51,359 INFO L158 Benchmark]: Toolchain (without parser) took 659.57ms. Allocated memory is still 151.0MB. Free memory was 109.6MB in the beginning and 88.7MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-24 22:00:51,360 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:00:51,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 656.65ms. Allocated memory is still 151.0MB. Free memory was 109.2MB in the beginning and 88.7MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-24 22:00:51,362 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 656.65ms. Allocated memory is still 151.0MB. Free memory was 109.2MB in the beginning and 88.7MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:00:53,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:00:54,057 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 22:00:54,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:00:54,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:00:54,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:00:54,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:00:54,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:00:54,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:00:54,107 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:00:54,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:00:54,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:00:54,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:00:54,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:00:54,110 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:00:54,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:00:54,111 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:00:54,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:00:54,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:00:54,113 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:00:54,114 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:00:54,114 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:00:54,115 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:00:54,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:00:54,116 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:00:54,116 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 22:00:54,116 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 22:00:54,117 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:00:54,117 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:00:54,118 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:00:54,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:00:54,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:00:54,119 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:00:54,119 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:00:54,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:54,120 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:00:54,120 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:00:54,120 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 22:00:54,120 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 22:00:54,121 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:00:54,121 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:00:54,121 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:00:54,121 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:00:54,122 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 22:00:54,122 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_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 [2023-11-24 22:00:54,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:00:54,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:00:54,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:00:54,557 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:00:54,557 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:00:54,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2023-11-24 22:00:57,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:00:58,176 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:00:58,176 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2023-11-24 22:00:58,196 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data/f64a5bf58/205397f977e6422a95429d0c80d27ee7/FLAG79aa92726 [2023-11-24 22:00:58,212 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/data/f64a5bf58/205397f977e6422a95429d0c80d27ee7 [2023-11-24 22:00:58,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:00:58,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:00:58,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:58,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:00:58,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:00:58,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:58" (1/1) ... [2023-11-24 22:00:58,228 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69955cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:58, skipping insertion in model container [2023-11-24 22:00:58,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:58" (1/1) ... [2023-11-24 22:00:58,330 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:00:59,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:59,166 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 22:00:59,183 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:00:59,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:59,358 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:00:59,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:59,560 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:00:59,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59 WrapperNode [2023-11-24 22:00:59,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:59,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:59,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:00:59,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:00:59,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,700 INFO L138 Inliner]: procedures = 180, calls = 350, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1173 [2023-11-24 22:00:59,701 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:59,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:00:59,702 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:00:59,702 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:00:59,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,873 INFO L175 MemorySlicer]: Split 319 memory accesses to 4 slices as follows [2, 5, 5, 307]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 84 writes are split as follows [0, 1, 1, 82]. [2023-11-24 22:00:59,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,980 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:00:59,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:01:00,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:01:00,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:01:00,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:01:00,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:01:00,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (1/1) ... [2023-11-24 22:01:00,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:00,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:01:00,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:01:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-11-24 22:01:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-11-24 22:01:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-11-24 22:01:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2023-11-24 22:01:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 22:01:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 22:01:00,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 22:01:00,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 22:01:00,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 22:01:00,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 22:01:00,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 22:01:00,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 22:01:00,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 22:01:00,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 22:01:00,129 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 22:01:00,130 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 22:01:00,131 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 22:01:00,131 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 22:01:00,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:01:00,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:01:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:01:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 22:01:00,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 22:01:00,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 22:01:00,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 22:01:00,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 22:01:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 22:01:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 22:01:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 22:01:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:01:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 22:01:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 22:01:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 22:01:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 22:01:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 22:01:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 22:01:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 22:01:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 22:01:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:01:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:01:00,471 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:01:00,474 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:01:00,479 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-24 22:01:00,561 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-24 22:01:00,600 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-24 22:01:00,633 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-24 22:01:07,361 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:01:07,632 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:01:07,632 INFO L309 CfgBuilder]: Removed 60 assume(true) statements. [2023-11-24 22:01:07,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:07 BoogieIcfgContainer [2023-11-24 22:01:07,633 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:01:07,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:01:07,636 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:01:07,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:01:07,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:00:58" (1/3) ... [2023-11-24 22:01:07,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b3cb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:07, skipping insertion in model container [2023-11-24 22:01:07,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:59" (2/3) ... [2023-11-24 22:01:07,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b3cb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:07, skipping insertion in model container [2023-11-24 22:01:07,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:07" (3/3) ... [2023-11-24 22:01:07,645 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-1.i [2023-11-24 22:01:07,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:01:07,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 648 error locations. [2023-11-24 22:01:07,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:01:07,760 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3f9cfdfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:01:07,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 648 error locations. [2023-11-24 22:01:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 1157 states, 496 states have (on average 2.5524193548387095) internal successors, (1266), 1148 states have internal predecessors, (1266), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 22:01:07,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:07,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 22:01:07,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:07,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:07,781 INFO L85 PathProgramCache]: Analyzing trace with hash 62011059, now seen corresponding path program 1 times [2023-11-24 22:01:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:07,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603764315] [2023-11-24 22:01:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:07,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:07,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:07,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 22:01:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:08,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 22:01:08,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:08,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:08,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603764315] [2023-11-24 22:01:08,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603764315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:08,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312186715] [2023-11-24 22:01:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:08,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:01:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:01:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:01:08,089 INFO L87 Difference]: Start difference. First operand has 1157 states, 496 states have (on average 2.5524193548387095) internal successors, (1266), 1148 states have internal predecessors, (1266), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:09,228 INFO L93 Difference]: Finished difference Result 1138 states and 1210 transitions. [2023-11-24 22:01:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:01:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 22:01:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:09,257 INFO L225 Difference]: With dead ends: 1138 [2023-11-24 22:01:09,257 INFO L226 Difference]: Without dead ends: 1137 [2023-11-24 22:01:09,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:01:09,262 INFO L413 NwaCegarLoop]: 1085 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:09,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1085 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 22:01:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2023-11-24 22:01:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1137. [2023-11-24 22:01:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 487 states have (on average 2.4168377823408624) internal successors, (1177), 1128 states have internal predecessors, (1177), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1209 transitions. [2023-11-24 22:01:09,368 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1209 transitions. Word has length 4 [2023-11-24 22:01:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:09,368 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1209 transitions. [2023-11-24 22:01:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1209 transitions. [2023-11-24 22:01:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 22:01:09,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:09,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 22:01:09,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:09,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:09,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:09,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash 62011121, now seen corresponding path program 1 times [2023-11-24 22:01:09,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:09,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596349724] [2023-11-24 22:01:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:09,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:09,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:09,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 22:01:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:09,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:01:09,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:09,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 22:01:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:09,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:09,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:09,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596349724] [2023-11-24 22:01:09,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596349724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:09,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:09,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:09,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732083041] [2023-11-24 22:01:09,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:09,851 INFO L87 Difference]: Start difference. First operand 1137 states and 1209 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:13,069 INFO L93 Difference]: Finished difference Result 1167 states and 1252 transitions. [2023-11-24 22:01:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:13,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 22:01:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:13,078 INFO L225 Difference]: With dead ends: 1167 [2023-11-24 22:01:13,078 INFO L226 Difference]: Without dead ends: 1167 [2023-11-24 22:01:13,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:13,080 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1042 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 576 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-24 22:01:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2023-11-24 22:01:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1110. [2023-11-24 22:01:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 553 states have (on average 2.18625678119349) internal successors, (1209), 1101 states have internal predecessors, (1209), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1241 transitions. [2023-11-24 22:01:13,121 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1241 transitions. Word has length 4 [2023-11-24 22:01:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1241 transitions. [2023-11-24 22:01:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1241 transitions. [2023-11-24 22:01:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 22:01:13,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:13,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 22:01:13,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:13,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:13,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 62011122, now seen corresponding path program 1 times [2023-11-24 22:01:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764750983] [2023-11-24 22:01:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:13,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:13,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:13,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 22:01:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:13,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:01:13,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:13,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 22:01:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:13,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:13,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764750983] [2023-11-24 22:01:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764750983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:13,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985499475] [2023-11-24 22:01:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:13,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:13,544 INFO L87 Difference]: Start difference. First operand 1110 states and 1241 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:17,995 INFO L93 Difference]: Finished difference Result 1382 states and 1533 transitions. [2023-11-24 22:01:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:17,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 22:01:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:18,003 INFO L225 Difference]: With dead ends: 1382 [2023-11-24 22:01:18,003 INFO L226 Difference]: Without dead ends: 1382 [2023-11-24 22:01:18,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:18,005 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 456 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:18,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1198 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-24 22:01:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2023-11-24 22:01:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1233. [2023-11-24 22:01:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 686 states have (on average 2.1603498542274053) internal successors, (1482), 1224 states have internal predecessors, (1482), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1514 transitions. [2023-11-24 22:01:18,043 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1514 transitions. Word has length 4 [2023-11-24 22:01:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:18,044 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 1514 transitions. [2023-11-24 22:01:18,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1514 transitions. [2023-11-24 22:01:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 22:01:18,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:18,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:01:18,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:18,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:18,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:18,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1924036044, now seen corresponding path program 1 times [2023-11-24 22:01:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294052827] [2023-11-24 22:01:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:18,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:18,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:18,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 22:01:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:18,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:01:18,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:18,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:18,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294052827] [2023-11-24 22:01:18,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294052827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:18,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:18,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868276710] [2023-11-24 22:01:18,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:18,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:18,404 INFO L87 Difference]: Start difference. First operand 1233 states and 1514 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:20,228 INFO L93 Difference]: Finished difference Result 2422 states and 2964 transitions. [2023-11-24 22:01:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 22:01:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:20,243 INFO L225 Difference]: With dead ends: 2422 [2023-11-24 22:01:20,244 INFO L226 Difference]: Without dead ends: 2422 [2023-11-24 22:01:20,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:20,245 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 1029 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:20,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1955 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 22:01:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2023-11-24 22:01:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1234. [2023-11-24 22:01:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 687 states have (on average 2.158660844250364) internal successors, (1483), 1225 states have internal predecessors, (1483), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1515 transitions. [2023-11-24 22:01:20,318 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1515 transitions. Word has length 5 [2023-11-24 22:01:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:20,318 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1515 transitions. [2023-11-24 22:01:20,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1515 transitions. [2023-11-24 22:01:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 22:01:20,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:20,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:20,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-24 22:01:20,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:20,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:20,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2120129477, now seen corresponding path program 1 times [2023-11-24 22:01:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:20,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571918015] [2023-11-24 22:01:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:20,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:20,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:20,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 22:01:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:20,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:01:20,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:20,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:20,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:20,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571918015] [2023-11-24 22:01:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571918015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:20,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:20,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143782552] [2023-11-24 22:01:20,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:20,737 INFO L87 Difference]: Start difference. First operand 1234 states and 1515 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:21,992 INFO L93 Difference]: Finished difference Result 1195 states and 1475 transitions. [2023-11-24 22:01:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:21,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 22:01:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:22,003 INFO L225 Difference]: With dead ends: 1195 [2023-11-24 22:01:22,003 INFO L226 Difference]: Without dead ends: 1195 [2023-11-24 22:01:22,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:22,006 INFO L413 NwaCegarLoop]: 933 mSDtfsCounter, 70 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:22,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1817 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 22:01:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2023-11-24 22:01:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2023-11-24 22:01:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 672 states have (on average 2.1473214285714284) internal successors, (1443), 1186 states have internal predecessors, (1443), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1475 transitions. [2023-11-24 22:01:22,049 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1475 transitions. Word has length 10 [2023-11-24 22:01:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:22,049 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 1475 transitions. [2023-11-24 22:01:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1475 transitions. [2023-11-24 22:01:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:01:22,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:22,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:22,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-24 22:01:22,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:22,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:22,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1629932395, now seen corresponding path program 1 times [2023-11-24 22:01:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:22,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846846171] [2023-11-24 22:01:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:22,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:22,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 22:01:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:22,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:01:22,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:22,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:22,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:22,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846846171] [2023-11-24 22:01:22,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846846171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:22,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:22,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:01:22,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759084902] [2023-11-24 22:01:22,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:22,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:22,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:22,486 INFO L87 Difference]: Start difference. First operand 1195 states and 1475 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:24,165 INFO L93 Difference]: Finished difference Result 1181 states and 1454 transitions. [2023-11-24 22:01:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 22:01:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:24,174 INFO L225 Difference]: With dead ends: 1181 [2023-11-24 22:01:24,174 INFO L226 Difference]: Without dead ends: 1181 [2023-11-24 22:01:24,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:01:24,176 INFO L413 NwaCegarLoop]: 902 mSDtfsCounter, 58 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:24,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 2682 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 22:01:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2023-11-24 22:01:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1180. [2023-11-24 22:01:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 671 states have (on average 2.1177347242921014) internal successors, (1421), 1171 states have internal predecessors, (1421), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1453 transitions. [2023-11-24 22:01:24,205 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1453 transitions. Word has length 12 [2023-11-24 22:01:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:24,206 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1453 transitions. [2023-11-24 22:01:24,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1453 transitions. [2023-11-24 22:01:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 22:01:24,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:24,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:24,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-24 22:01:24,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:24,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:24,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash 380814595, now seen corresponding path program 1 times [2023-11-24 22:01:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:24,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093140788] [2023-11-24 22:01:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:24,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:24,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:24,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:24,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-24 22:01:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:24,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:01:24,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:24,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 22:01:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:24,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:24,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093140788] [2023-11-24 22:01:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093140788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:24,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:24,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:24,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978389596] [2023-11-24 22:01:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:24,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:24,693 INFO L87 Difference]: Start difference. First operand 1180 states and 1453 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:28,230 INFO L93 Difference]: Finished difference Result 1233 states and 1460 transitions. [2023-11-24 22:01:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-24 22:01:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:28,238 INFO L225 Difference]: With dead ends: 1233 [2023-11-24 22:01:28,238 INFO L226 Difference]: Without dead ends: 1233 [2023-11-24 22:01:28,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:01:28,239 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 977 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:28,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 913 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-24 22:01:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-11-24 22:01:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1176. [2023-11-24 22:01:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 671 states have (on average 2.1117734724292103) internal successors, (1417), 1167 states have internal predecessors, (1417), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1449 transitions. [2023-11-24 22:01:28,269 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1449 transitions. Word has length 26 [2023-11-24 22:01:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:28,270 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1449 transitions. [2023-11-24 22:01:28,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1449 transitions. [2023-11-24 22:01:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 22:01:28,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:28,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:28,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-24 22:01:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:28,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:28,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash 380814596, now seen corresponding path program 1 times [2023-11-24 22:01:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:28,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816329484] [2023-11-24 22:01:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:28,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:28,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:28,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:28,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-24 22:01:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:28,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 22:01:28,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:28,701 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 [2023-11-24 22:01:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:28,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:28,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:28,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816329484] [2023-11-24 22:01:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816329484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:28,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:28,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762708788] [2023-11-24 22:01:28,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:28,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:28,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:28,959 INFO L87 Difference]: Start difference. First operand 1176 states and 1449 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:34,037 INFO L93 Difference]: Finished difference Result 1321 states and 1464 transitions. [2023-11-24 22:01:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-24 22:01:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:34,045 INFO L225 Difference]: With dead ends: 1321 [2023-11-24 22:01:34,045 INFO L226 Difference]: Without dead ends: 1321 [2023-11-24 22:01:34,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:01:34,046 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 393 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:34,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1577 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-24 22:01:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2023-11-24 22:01:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1172. [2023-11-24 22:01:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 671 states have (on average 2.105812220566319) internal successors, (1413), 1163 states have internal predecessors, (1413), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1445 transitions. [2023-11-24 22:01:34,081 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1445 transitions. Word has length 26 [2023-11-24 22:01:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:34,082 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1445 transitions. [2023-11-24 22:01:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1445 transitions. [2023-11-24 22:01:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 22:01:34,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:34,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:34,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:34,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:34,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:34,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 192720509, now seen corresponding path program 1 times [2023-11-24 22:01:34,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:34,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842561201] [2023-11-24 22:01:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:34,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:34,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:34,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-24 22:01:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:34,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:01:34,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:34,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:34,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:34,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842561201] [2023-11-24 22:01:34,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842561201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:34,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:34,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:01:34,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851142933] [2023-11-24 22:01:34,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:34,610 INFO L87 Difference]: Start difference. First operand 1172 states and 1445 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:36,205 INFO L93 Difference]: Finished difference Result 1166 states and 1435 transitions. [2023-11-24 22:01:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-24 22:01:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:36,217 INFO L225 Difference]: With dead ends: 1166 [2023-11-24 22:01:36,217 INFO L226 Difference]: Without dead ends: 1166 [2023-11-24 22:01:36,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:01:36,221 INFO L413 NwaCegarLoop]: 896 mSDtfsCounter, 23 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:36,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2668 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 22:01:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2023-11-24 22:01:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1166. [2023-11-24 22:01:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 665 states have (on average 2.1097744360902255) internal successors, (1403), 1157 states have internal predecessors, (1403), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1435 transitions. [2023-11-24 22:01:36,249 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1435 transitions. Word has length 42 [2023-11-24 22:01:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:36,250 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1435 transitions. [2023-11-24 22:01:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1435 transitions. [2023-11-24 22:01:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-24 22:01:36,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:36,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:36,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:36,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:36,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:36,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2124802211, now seen corresponding path program 1 times [2023-11-24 22:01:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992021214] [2023-11-24 22:01:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:36,467 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:36,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-24 22:01:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:36,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:01:36,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:37,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:37,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992021214] [2023-11-24 22:01:37,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992021214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:37,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:37,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606719972] [2023-11-24 22:01:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:37,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:37,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:37,085 INFO L87 Difference]: Start difference. First operand 1166 states and 1435 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:38,313 INFO L93 Difference]: Finished difference Result 1209 states and 1478 transitions. [2023-11-24 22:01:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-24 22:01:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:38,321 INFO L225 Difference]: With dead ends: 1209 [2023-11-24 22:01:38,321 INFO L226 Difference]: Without dead ends: 1209 [2023-11-24 22:01:38,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:38,322 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 59 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:38,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1744 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 22:01:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2023-11-24 22:01:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1209. [2023-11-24 22:01:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 708 states have (on average 2.042372881355932) internal successors, (1446), 1200 states have internal predecessors, (1446), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:01:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1478 transitions. [2023-11-24 22:01:38,349 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1478 transitions. Word has length 46 [2023-11-24 22:01:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:38,350 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1478 transitions. [2023-11-24 22:01:38,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1478 transitions. [2023-11-24 22:01:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 22:01:38,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:38,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:38,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-24 22:01:38,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:38,556 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 645 more)] === [2023-11-24 22:01:38,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash -862114412, now seen corresponding path program 1 times [2023-11-24 22:01:38,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:38,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433827882] [2023-11-24 22:01:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:38,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:38,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:38,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:01:38,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a3e29d8-7120-4361-bb07-c5790e86bf10/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-24 22:01:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:38,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 22:01:38,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:38,961 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 [2023-11-24 22:01:38,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 22:01:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:39,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:01:39,591 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 22:01:39,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 22:01:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:39,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:39,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433827882] [2023-11-24 22:01:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433827882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:39,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882442218] [2023-11-24 22:01:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:39,610 INFO L87 Difference]: Start difference. First operand 1209 states and 1478 transitions. Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)