./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx --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 b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:07:35,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:07:35,711 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:07:35,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:07:35,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:07:35,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:07:35,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:07:35,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:07:35,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:07:35,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:07:35,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:07:35,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:07:35,788 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:07:35,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:07:35,791 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:07:35,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:07:35,792 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:07:35,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:07:35,793 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:07:35,794 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:07:35,794 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:07:35,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:07:35,795 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:07:35,796 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:07:35,796 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:07:35,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:07:35,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:07:35,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:07:35,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:07:35,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:07:35,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:35,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:07:35,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:07:35,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:07:35,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:07:35,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:07:35,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:07:35,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:07:35,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:07:35,815 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b [2023-11-21 22:07:36,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:07:36,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:07:36,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:07:36,216 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:07:36,216 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:07:36,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2023-11-21 22:07:39,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:07:39,592 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:07:39,593 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2023-11-21 22:07:39,612 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data/e0fecbdbb/9f6add6447fa45da8e1a84043211a55b/FLAG5fda37930 [2023-11-21 22:07:39,627 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data/e0fecbdbb/9f6add6447fa45da8e1a84043211a55b [2023-11-21 22:07:39,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:07:39,632 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:07:39,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:39,634 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:07:39,646 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:07:39,647 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:39" (1/1) ... [2023-11-21 22:07:39,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ad3fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:39, skipping insertion in model container [2023-11-21 22:07:39,648 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:39" (1/1) ... [2023-11-21 22:07:39,745 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:07:40,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:40,192 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) [2023-11-21 22:07:40,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e938245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:40, skipping insertion in model container [2023-11-21 22:07:40,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:40,194 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 22:07:40,196 INFO L158 Benchmark]: Toolchain (without parser) took 563.07ms. Allocated memory is still 167.8MB. Free memory was 136.6MB in the beginning and 125.1MB in the end (delta: 11.5MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2023-11-21 22:07:40,196 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 127.9MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:07:40,197 INFO L158 Benchmark]: CACSL2BoogieTranslator took 560.35ms. Allocated memory is still 167.8MB. Free memory was 136.4MB in the beginning and 125.1MB in the end (delta: 11.3MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2023-11-21 22:07:40,199 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 127.9MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 560.35ms. Allocated memory is still 167.8MB. Free memory was 136.4MB in the beginning and 125.1MB in the end (delta: 11.3MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx --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 b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:07:42,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:07:42,965 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:07:42,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:07:42,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:07:43,046 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:07:43,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:07:43,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:07:43,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:07:43,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:07:43,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:07:43,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:07:43,058 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:07:43,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:07:43,061 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:07:43,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:07:43,062 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:07:43,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:07:43,064 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:07:43,065 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:07:43,066 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:07:43,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:07:43,067 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:07:43,068 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:07:43,069 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:07:43,069 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:07:43,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:07:43,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:07:43,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:07:43,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:07:43,075 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:07:43,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:07:43,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:43,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:07:43,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:07:43,078 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:07:43,079 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:07:43,079 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:07:43,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:07:43,081 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:07:43,082 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:07:43,083 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:07:43,083 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_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b [2023-11-21 22:07:43,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:07:43,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:07:43,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:07:43,626 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:07:43,627 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:07:43,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2023-11-21 22:07:46,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:07:47,228 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:07:47,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2023-11-21 22:07:47,246 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data/298681bb9/00faf0c6f10c486b819d18311c271b30/FLAGf7204b550 [2023-11-21 22:07:47,261 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/data/298681bb9/00faf0c6f10c486b819d18311c271b30 [2023-11-21 22:07:47,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:07:47,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:07:47,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:47,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:07:47,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:07:47,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:47" (1/1) ... [2023-11-21 22:07:47,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e61367d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:47, skipping insertion in model container [2023-11-21 22:07:47,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:47" (1/1) ... [2023-11-21 22:07:47,336 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:07:47,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:47,773 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 22:07:47,785 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:07:47,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:47,911 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:07:48,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:48,081 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:07:48,089 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:07:48,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48 WrapperNode [2023-11-21 22:07:48,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:48,090 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:48,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:07:48,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:07:48,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,179 INFO L138 Inliner]: procedures = 167, calls = 78, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 84 [2023-11-21 22:07:48,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:48,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:07:48,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:07:48,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:07:48,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,223 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:07:48,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:07:48,264 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:07:48,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:07:48,265 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (1/1) ... [2023-11-21 22:07:48,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:48,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:07:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:07:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 22:07:48,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:07:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:07:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:07:48,511 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:07:48,513 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:07:48,818 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:07:48,939 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:07:48,939 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 22:07:48,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:48 BoogieIcfgContainer [2023-11-21 22:07:48,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:07:48,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:07:48,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:07:48,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:07:48,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:07:47" (1/3) ... [2023-11-21 22:07:48,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea9b55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:48, skipping insertion in model container [2023-11-21 22:07:48,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:48" (2/3) ... [2023-11-21 22:07:48,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea9b55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:48, skipping insertion in model container [2023-11-21 22:07:48,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:48" (3/3) ... [2023-11-21 22:07:48,958 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_1-1.i [2023-11-21 22:07:48,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:07:48,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-21 22:07:49,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:07:49,075 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;@3992b0dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:07:49,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-21 22:07:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:07:49,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:49,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:49,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:07:49,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 902276809, now seen corresponding path program 1 times [2023-11-21 22:07:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:07:49,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232971152] [2023-11-21 22:07:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:49,116 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 [2023-11-21 22:07:49,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:07:49,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:07:49,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:49,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:07:49,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:49,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:49,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:07:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232971152] [2023-11-21 22:07:49,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232971152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:49,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:49,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:07:49,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794334067] [2023-11-21 22:07:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:49,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:07:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:07:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:07:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:07:49,813 INFO L87 Difference]: Start difference. First operand has 45 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:50,384 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2023-11-21 22:07:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:07:50,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-21 22:07:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:50,396 INFO L225 Difference]: With dead ends: 61 [2023-11-21 22:07:50,396 INFO L226 Difference]: Without dead ends: 58 [2023-11-21 22:07:50,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:07:50,408 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:50,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 116 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:07:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-21 22:07:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2023-11-21 22:07:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.875) internal successors, (45), 40 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-11-21 22:07:50,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 8 [2023-11-21 22:07:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:50,464 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-11-21 22:07:50,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-11-21 22:07:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:07:50,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:50,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:50,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:07:50,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:07:50,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash 902275915, now seen corresponding path program 1 times [2023-11-21 22:07:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:07:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957470859] [2023-11-21 22:07:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:50,671 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 [2023-11-21 22:07:50,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:07:50,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:07:50,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:50,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:07:50,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:50,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-21 22:07:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:51,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:51,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:07:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957470859] [2023-11-21 22:07:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957470859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:51,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:51,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:07:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783495703] [2023-11-21 22:07:51,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:07:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:07:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:07:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:07:51,136 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:51,476 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-11-21 22:07:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:07:51,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-21 22:07:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:51,478 INFO L225 Difference]: With dead ends: 57 [2023-11-21 22:07:51,479 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 22:07:51,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:07:51,480 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:51,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 101 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 22:07:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-11-21 22:07:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-21 22:07:51,489 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2023-11-21 22:07:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:51,490 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-21 22:07:51,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-21 22:07:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:07:51,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:51,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:51,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:07:51,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:07:51,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash 902275916, now seen corresponding path program 1 times [2023-11-21 22:07:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:07:51,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610862326] [2023-11-21 22:07:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:51,696 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 [2023-11-21 22:07:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:07:51,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:07:51,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:51,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:07:51,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:51,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:07:51,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:07:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:52,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:52,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:07:52,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610862326] [2023-11-21 22:07:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610862326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:52,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:07:52,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96704138] [2023-11-21 22:07:52,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:07:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:07:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:07:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:07:52,134 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 7 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:52,585 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-11-21 22:07:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:07:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-21 22:07:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:52,588 INFO L225 Difference]: With dead ends: 59 [2023-11-21 22:07:52,588 INFO L226 Difference]: Without dead ends: 59 [2023-11-21 22:07:52,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:07:52,590 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:52,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 115 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-21 22:07:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2023-11-21 22:07:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 41 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-11-21 22:07:52,597 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 8 [2023-11-21 22:07:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:52,598 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-11-21 22:07:52,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-11-21 22:07:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:07:52,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:52,600 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:52,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:07:52,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:07:52,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash -496145521, now seen corresponding path program 1 times [2023-11-21 22:07:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:07:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421769315] [2023-11-21 22:07:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:52,813 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 [2023-11-21 22:07:52,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:07:52,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:07:52,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:52,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:07:52,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:52,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:07:52,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:07:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:53,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:54,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:07:54,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:07:54,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 6 [2023-11-21 22:07:54,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-21 22:07:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:54,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:07:54,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421769315] [2023-11-21 22:07:54,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421769315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:54,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:07:54,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-21 22:07:54,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95015117] [2023-11-21 22:07:54,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:07:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:07:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:07:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:07:54,746 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:56,266 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2023-11-21 22:07:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:07:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 10 [2023-11-21 22:07:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:56,276 INFO L225 Difference]: With dead ends: 94 [2023-11-21 22:07:56,276 INFO L226 Difference]: Without dead ends: 94 [2023-11-21 22:07:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:07:56,278 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:56,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 236 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 22:07:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-21 22:07:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2023-11-21 22:07:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.6875) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-11-21 22:07:56,290 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 10 [2023-11-21 22:07:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:56,291 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-11-21 22:07:56,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-11-21 22:07:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:07:56,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:56,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:56,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:56,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:07:56,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:07:56,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash -815945149, now seen corresponding path program 1 times [2023-11-21 22:07:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:07:56,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631131235] [2023-11-21 22:07:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:56,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:07:56,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:07:56,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:07:56,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:56,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:07:56,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:56,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:56,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:07:56,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631131235] [2023-11-21 22:07:56,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631131235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:56,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:07:56,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-21 22:07:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909582984] [2023-11-21 22:07:56,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:56,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:07:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:07:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:07:56,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:07:56,787 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:57,060 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-21 22:07:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:07:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-21 22:07:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:57,063 INFO L225 Difference]: With dead ends: 55 [2023-11-21 22:07:57,063 INFO L226 Difference]: Without dead ends: 55 [2023-11-21 22:07:57,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:07:57,064 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 100 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:57,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 127 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-21 22:07:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-11-21 22:07:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.6) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-21 22:07:57,070 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 15 [2023-11-21 22:07:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:57,070 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-21 22:07:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:07:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-21 22:07:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:07:57,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:57,071 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:57,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:07:57,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:07:57,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1751476184, now seen corresponding path program 2 times [2023-11-21 22:07:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:07:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938847268] [2023-11-21 22:07:57,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:07:57,290 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 [2023-11-21 22:07:57,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:07:57,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:07:57,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:07:57,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:07:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:07:57,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 22:07:57,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:57,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:07:57,482 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 [2023-11-21 22:07:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:58,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:00,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:08:00,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 6 [2023-11-21 22:08:00,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:08:00,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-21 22:08:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:00,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:08:00,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938847268] [2023-11-21 22:08:00,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938847268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:08:00,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:08:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-21 22:08:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832321408] [2023-11-21 22:08:00,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:00,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:08:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:08:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:08:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:08:00,521 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:04,294 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2023-11-21 22:08:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:08:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-21 22:08:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:04,296 INFO L225 Difference]: With dead ends: 120 [2023-11-21 22:08:04,297 INFO L226 Difference]: Without dead ends: 120 [2023-11-21 22:08:04,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:08:04,299 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 295 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:04,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 253 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-21 22:08:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-21 22:08:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 63. [2023-11-21 22:08:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-11-21 22:08:04,308 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 16 [2023-11-21 22:08:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:04,308 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-11-21 22:08:04,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-11-21 22:08:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:08:04,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:04,310 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:04,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:08:04,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:08:04,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:08:04,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash 396357687, now seen corresponding path program 2 times [2023-11-21 22:08:04,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:08:04,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878192590] [2023-11-21 22:08:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:08:04,514 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 [2023-11-21 22:08:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:08:04,515 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:08:04,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:04,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 22:08:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:08:04,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:08:04,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 22:08:04,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:08:04,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:08:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878192590] [2023-11-21 22:08:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878192590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:04,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:04,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:08:04,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061071648] [2023-11-21 22:08:04,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:04,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:08:04,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:08:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:08:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:08:04,663 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:08:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:04,756 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2023-11-21 22:08:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:08:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-21 22:08:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:04,759 INFO L225 Difference]: With dead ends: 84 [2023-11-21 22:08:04,759 INFO L226 Difference]: Without dead ends: 84 [2023-11-21 22:08:04,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:08:04,760 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:04,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 69 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:08:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-21 22:08:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2023-11-21 22:08:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2023-11-21 22:08:04,771 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 23 [2023-11-21 22:08:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:04,772 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2023-11-21 22:08:04,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:08:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2023-11-21 22:08:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:08:04,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:04,773 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:04,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:08:04,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:08:04,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:08:04,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash 162360619, now seen corresponding path program 1 times [2023-11-21 22:08:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:08:04,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625263096] [2023-11-21 22:08:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:04,987 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 [2023-11-21 22:08:04,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:08:04,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:08:04,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:05,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:08:05,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:05,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:08:05,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:08:05,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625263096] [2023-11-21 22:08:05,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625263096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:08:05,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:08:05,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-21 22:08:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774256083] [2023-11-21 22:08:05,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:05,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:08:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:08:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:08:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:08:05,607 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:08:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:06,189 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-21 22:08:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:08:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-21 22:08:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:06,191 INFO L225 Difference]: With dead ends: 64 [2023-11-21 22:08:06,191 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 22:08:06,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:08:06,192 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:06,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 277 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:08:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 22:08:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-21 22:08:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-11-21 22:08:06,198 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 26 [2023-11-21 22:08:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:06,198 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-11-21 22:08:06,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:08:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-11-21 22:08:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:08:06,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:06,200 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:06,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:06,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:08:06,408 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:08:06,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1515331626, now seen corresponding path program 3 times [2023-11-21 22:08:06,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:08:06,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101018021] [2023-11-21 22:08:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:08:06,409 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 [2023-11-21 22:08:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:08:06,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:08:06,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:06,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-21 22:08:06,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:08:06,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:08:06,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:06,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:08:06,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:08:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:07,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:13,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:08:13,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:08:13,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 6 [2023-11-21 22:08:13,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-21 22:08:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:13,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:08:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101018021] [2023-11-21 22:08:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101018021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:08:13,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:08:13,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2023-11-21 22:08:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394588071] [2023-11-21 22:08:13,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:13,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 22:08:13,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:08:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 22:08:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:08:13,259 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 30 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:17,714 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-11-21 22:08:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:08:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 30 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-21 22:08:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:17,717 INFO L225 Difference]: With dead ends: 96 [2023-11-21 22:08:17,717 INFO L226 Difference]: Without dead ends: 96 [2023-11-21 22:08:17,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2023-11-21 22:08:17,718 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 592 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:17,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 477 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-21 22:08:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-21 22:08:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 62. [2023-11-21 22:08:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-11-21 22:08:17,725 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 28 [2023-11-21 22:08:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:17,725 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-11-21 22:08:17,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 30 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-11-21 22:08:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:08:17,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:17,727 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:17,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:17,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:08:17,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:08:17,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1693473097, now seen corresponding path program 2 times [2023-11-21 22:08:17,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:08:17,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457288694] [2023-11-21 22:08:17,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:08:17,933 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 [2023-11-21 22:08:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:08:17,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:08:17,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:08:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:08:18,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:08:18,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:18,142 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 12 treesize of output 11 [2023-11-21 22:08:18,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-21 22:08:18,851 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-21 22:08:18,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-21 22:08:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-21 22:08:19,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:08:19,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:08:19,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457288694] [2023-11-21 22:08:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457288694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:19,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:19,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 22:08:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091086192] [2023-11-21 22:08:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:08:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:08:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:08:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:08:19,354 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:21,022 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-11-21 22:08:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:08:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-21 22:08:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:21,024 INFO L225 Difference]: With dead ends: 97 [2023-11-21 22:08:21,024 INFO L226 Difference]: Without dead ends: 97 [2023-11-21 22:08:21,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:08:21,025 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:21,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 137 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 22:08:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-21 22:08:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2023-11-21 22:08:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-11-21 22:08:21,033 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 34 [2023-11-21 22:08:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:21,033 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-11-21 22:08:21,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:08:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-11-21 22:08:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:08:21,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:21,035 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:21,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:08:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:08:21,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:08:21,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1693473096, now seen corresponding path program 1 times [2023-11-21 22:08:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:08:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055769216] [2023-11-21 22:08:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:21,241 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 [2023-11-21 22:08:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:08:21,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:08:21,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:08:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:21,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-21 22:08:21,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:21,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:08:21,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-21 22:08:22,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:08:22,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-21 22:08:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:08:22,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:08:22,649 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:08:22,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2023-11-21 22:08:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-21 22:08:22,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:24,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:08:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055769216] [2023-11-21 22:08:24,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055769216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:08:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1621966674] [2023-11-21 22:08:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:24,363 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 22:08:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/cvc4 [2023-11-21 22:08:24,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 22:08:24,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0aca12-7824-4218-983c-79ec14a99fa5/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-11-21 22:08:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:24,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 22:08:24,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:24,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:08:25,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2023-11-21 22:08:26,165 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:08:26,165 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 [2023-11-21 22:08:26,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:08:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:08:26,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:08:26,667 INFO L349 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-11-21 22:08:26,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 48 [2023-11-21 22:08:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 22:08:26,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1621966674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:08:28,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:08:28,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-11-21 22:08:28,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922658410] [2023-11-21 22:08:28,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:28,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:08:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:08:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:08:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:08:28,010 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 22 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)