./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0102-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:04:52,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:04:52,119 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:04:52,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:04:52,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:04:52,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:04:52,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:04:52,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:04:52,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:04:52,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:04:52,155 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:04:52,156 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:04:52,156 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:04:52,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:04:52,158 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:04:52,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:04:52,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:04:52,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:04:52,160 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:04:52,161 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:04:52,162 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:04:52,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:04:52,163 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:04:52,163 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:04:52,164 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:04:52,164 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:04:52,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:04:52,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:04:52,166 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:04:52,166 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:04:52,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:04:52,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:04:52,167 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:04:52,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:04:52,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:04:52,168 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:04:52,168 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:04:52,169 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:04:52,169 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:04:52,169 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_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2023-11-21 22:04:52,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:04:52,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:04:52,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:04:52,561 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:04:52,561 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:04:52,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-21 22:04:55,710 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:04:55,993 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:04:56,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-21 22:04:56,025 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data/3da4c4640/bb82c1293bc9490680f4ad21504974ad/FLAG5d7bd1022 [2023-11-21 22:04:56,038 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data/3da4c4640/bb82c1293bc9490680f4ad21504974ad [2023-11-21 22:04:56,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:04:56,043 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:04:56,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:04:56,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:04:56,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:04:56,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:04:56" (1/1) ... [2023-11-21 22:04:56,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510ef00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:56, skipping insertion in model container [2023-11-21 22:04:56,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:04:56" (1/1) ... [2023-11-21 22:04:56,131 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:04:56,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:04:56,617 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 22:04:56,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f24c600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:56, skipping insertion in model container [2023-11-21 22:04:56,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:04:56,619 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 22:04:56,621 INFO L158 Benchmark]: Toolchain (without parser) took 577.21ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 107.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 22:04:56,622 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 134.2MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:04:56,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 574.55ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 107.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 22:04:56,625 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 134.2MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 574.55ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 107.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:04:59,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:04:59,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:04:59,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:04:59,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:04:59,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:04:59,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:04:59,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:04:59,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:04:59,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:04:59,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:04:59,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:04:59,304 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:04:59,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:04:59,307 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:04:59,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:04:59,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:04:59,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:04:59,308 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:04:59,309 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:04:59,309 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:04:59,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:04:59,310 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:04:59,311 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:04:59,311 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:04:59,312 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:04:59,312 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:04:59,312 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:04:59,313 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:04:59,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:04:59,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:04:59,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:04:59,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:04:59,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:04:59,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:04:59,317 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:04:59,317 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:04:59,317 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:04:59,317 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:04:59,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:04:59,319 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:04:59,319 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:04:59,319 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_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2023-11-21 22:04:59,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:04:59,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:04:59,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:04:59,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:04:59,815 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:04:59,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-21 22:05:02,954 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:05:03,302 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:05:03,303 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-21 22:05:03,320 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data/40d296fcd/2c942e5fa1034a9f991d8c97b6bdeea4/FLAGf42e04119 [2023-11-21 22:05:03,336 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/data/40d296fcd/2c942e5fa1034a9f991d8c97b6bdeea4 [2023-11-21 22:05:03,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:05:03,340 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:05:03,342 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:03,342 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:05:03,347 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:05:03,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:03" (1/1) ... [2023-11-21 22:05:03,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4b89c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:03, skipping insertion in model container [2023-11-21 22:05:03,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:03" (1/1) ... [2023-11-21 22:05:03,431 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:05:03,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:03,918 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 22:05:03,936 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:05:04,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:04,011 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:05:04,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:04,131 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:05:04,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04 WrapperNode [2023-11-21 22:05:04,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:04,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:04,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:05:04,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:05:04,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,248 INFO L138 Inliner]: procedures = 136, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-21 22:05:04,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:04,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:05:04,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:05:04,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:05:04,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,278 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:05:04,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:05:04,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:05:04,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:05:04,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (1/1) ... [2023-11-21 22:05:04,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:04,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:04,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:05:04,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:05:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-21 22:05:04,413 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-21 22:05:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:05:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:05:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2023-11-21 22:05:04,414 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2023-11-21 22:05:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:05:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:05:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:05:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sub [2023-11-21 22:05:04,416 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sub [2023-11-21 22:05:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 22:05:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:05:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:05:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 22:05:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:05:04,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:05:04,599 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:05:04,601 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:05:05,014 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:05:05,108 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:05:05,108 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 22:05:05,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:05 BoogieIcfgContainer [2023-11-21 22:05:05,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:05:05,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:05:05,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:05:05,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:05:05,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:05:03" (1/3) ... [2023-11-21 22:05:05,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3445127e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:05, skipping insertion in model container [2023-11-21 22:05:05,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:04" (2/3) ... [2023-11-21 22:05:05,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3445127e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:05, skipping insertion in model container [2023-11-21 22:05:05,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:05" (3/3) ... [2023-11-21 22:05:05,119 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0102-1.i [2023-11-21 22:05:05,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:05:05,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-21 22:05:05,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:05,192 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;@28c59c32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:05,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-21 22:05:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 33 states have (on average 2.121212121212121) internal successors, (70), 64 states have internal predecessors, (70), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:05:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:05:05,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:05,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:05:05,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:05,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash 184367852, now seen corresponding path program 1 times [2023-11-21 22:05:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:05,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190593170] [2023-11-21 22:05:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:05,224 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 22:05:05,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:05,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:05,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:05,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:05:05,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:05,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:05,494 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 22:05:05,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:05,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190593170] [2023-11-21 22:05:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190593170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:05,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:05:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125184087] [2023-11-21 22:05:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:05,542 INFO L87 Difference]: Start difference. First operand has 74 states, 33 states have (on average 2.121212121212121) internal successors, (70), 64 states have internal predecessors, (70), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:06,010 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-11-21 22:05:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 22:05:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:06,022 INFO L225 Difference]: With dead ends: 72 [2023-11-21 22:05:06,022 INFO L226 Difference]: Without dead ends: 71 [2023-11-21 22:05:06,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:06,028 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:06,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 143 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:05:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-21 22:05:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-21 22:05:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 61 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:05:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-11-21 22:05:06,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 5 [2023-11-21 22:05:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:06,087 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-11-21 22:05:06,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-11-21 22:05:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:05:06,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:06,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:05:06,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:06,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:06,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash 184367853, now seen corresponding path program 1 times [2023-11-21 22:05:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548851362] [2023-11-21 22:05:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:06,297 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 22:05:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:06,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:06,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:05:06,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:06,415 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 22:05:06,499 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 22:05:06,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:06,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:06,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548851362] [2023-11-21 22:05:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548851362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:06,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:06,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:05:06,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719161550] [2023-11-21 22:05:06,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:06,509 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:06,903 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2023-11-21 22:05:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 22:05:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:06,912 INFO L225 Difference]: With dead ends: 75 [2023-11-21 22:05:06,912 INFO L226 Difference]: Without dead ends: 75 [2023-11-21 22:05:06,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:06,914 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 5 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:06,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:05:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-21 22:05:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-11-21 22:05:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 63 states have internal predecessors, (68), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:05:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-11-21 22:05:06,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 5 [2023-11-21 22:05:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:06,928 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-11-21 22:05:06,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-11-21 22:05:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:05:06,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:06,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:06,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:07,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash -760513373, now seen corresponding path program 1 times [2023-11-21 22:05:07,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:07,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256291833] [2023-11-21 22:05:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:07,135 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 22:05:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:07,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:05:07,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:07,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:07,256 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 22:05:07,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:07,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:07,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256291833] [2023-11-21 22:05:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256291833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:07,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:07,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:07,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428244764] [2023-11-21 22:05:07,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:07,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:07,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:07,259 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:07,416 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2023-11-21 22:05:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:07,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:05:07,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:07,429 INFO L225 Difference]: With dead ends: 73 [2023-11-21 22:05:07,430 INFO L226 Difference]: Without dead ends: 73 [2023-11-21 22:05:07,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:07,432 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:07,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-21 22:05:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-21 22:05:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 62 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:05:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-11-21 22:05:07,446 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 8 [2023-11-21 22:05:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:07,446 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-11-21 22:05:07,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-11-21 22:05:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:05:07,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:07,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:07,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:07,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash -760513372, now seen corresponding path program 1 times [2023-11-21 22:05:07,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:07,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025168685] [2023-11-21 22:05:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:07,653 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 22:05:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:07,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:05:07,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:07,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:05:07,820 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 22:05:07,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:07,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:07,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025168685] [2023-11-21 22:05:07,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025168685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:07,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724957108] [2023-11-21 22:05:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:07,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:07,830 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:08,031 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-11-21 22:05:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:05:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:08,034 INFO L225 Difference]: With dead ends: 72 [2023-11-21 22:05:08,034 INFO L226 Difference]: Without dead ends: 72 [2023-11-21 22:05:08,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:08,039 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:08,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:05:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-21 22:05:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-21 22:05:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 61 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:05:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2023-11-21 22:05:08,050 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 8 [2023-11-21 22:05:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:08,050 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2023-11-21 22:05:08,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2023-11-21 22:05:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:05:08,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:08,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:08,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:08,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:08,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash -501298064, now seen corresponding path program 1 times [2023-11-21 22:05:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:08,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400259410] [2023-11-21 22:05:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:08,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:05:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:08,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:08,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:08,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:05:08,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:08,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:08,543 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:05:08,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-21 22:05:08,664 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 22:05:08,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:08,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:08,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400259410] [2023-11-21 22:05:08,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400259410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:08,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:08,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:05:08,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253705404] [2023-11-21 22:05:08,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:05:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:05:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:05:08,667 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:09,503 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2023-11-21 22:05:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:05:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:05:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:09,505 INFO L225 Difference]: With dead ends: 88 [2023-11-21 22:05:09,505 INFO L226 Difference]: Without dead ends: 88 [2023-11-21 22:05:09,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:09,507 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 58 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:09,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 208 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:05:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-21 22:05:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2023-11-21 22:05:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 67 states have internal predecessors, (81), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:05:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2023-11-21 22:05:09,516 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 11 [2023-11-21 22:05:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:09,517 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2023-11-21 22:05:09,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2023-11-21 22:05:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:05:09,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:09,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:09,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:09,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:09,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:09,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash -501298063, now seen corresponding path program 1 times [2023-11-21 22:05:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:09,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152576027] [2023-11-21 22:05:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:09,723 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 22:05:09,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:09,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:09,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:09,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 22:05:09,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:09,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:09,905 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 22:05:10,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:05:10,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:05:10,058 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:05:10,059 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 22:05:10,157 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 22:05:10,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:10,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:10,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152576027] [2023-11-21 22:05:10,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152576027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:10,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:10,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:05:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880225609] [2023-11-21 22:05:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:05:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:05:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:05:10,161 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:10,961 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2023-11-21 22:05:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:05:10,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:05:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:10,963 INFO L225 Difference]: With dead ends: 101 [2023-11-21 22:05:10,963 INFO L226 Difference]: Without dead ends: 101 [2023-11-21 22:05:10,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:10,964 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 40 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:10,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 234 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:05:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-21 22:05:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2023-11-21 22:05:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 79 states have internal predecessors, (101), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:05:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2023-11-21 22:05:10,973 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 11 [2023-11-21 22:05:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:10,974 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2023-11-21 22:05:10,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2023-11-21 22:05:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:05:10,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:10,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:10,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:11,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1639632213, now seen corresponding path program 1 times [2023-11-21 22:05:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518542709] [2023-11-21 22:05:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:11,180 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 22:05:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:11,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:11,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:05:11,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:11,321 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 22:05:11,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:11,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518542709] [2023-11-21 22:05:11,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518542709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:11,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:11,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643937323] [2023-11-21 22:05:11,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:11,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:11,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:11,325 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:11,458 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2023-11-21 22:05:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 22:05:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:11,460 INFO L225 Difference]: With dead ends: 92 [2023-11-21 22:05:11,460 INFO L226 Difference]: Without dead ends: 92 [2023-11-21 22:05:11,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:11,461 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:11,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-21 22:05:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-21 22:05:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.849056603773585) internal successors, (98), 78 states have internal predecessors, (98), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:05:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-11-21 22:05:11,471 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 12 [2023-11-21 22:05:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:11,471 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-11-21 22:05:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-11-21 22:05:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:05:11,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:11,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:11,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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)] Ended with exit code 0 [2023-11-21 22:05:11,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:11,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1639632214, now seen corresponding path program 1 times [2023-11-21 22:05:11,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:11,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967590208] [2023-11-21 22:05:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:11,677 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 22:05:11,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:11,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:11,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:05:11,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:11,945 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 22:05:11,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:11,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:11,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967590208] [2023-11-21 22:05:11,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967590208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:11,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:11,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:05:11,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330442854] [2023-11-21 22:05:11,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:05:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:05:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:05:11,948 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:12,471 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2023-11-21 22:05:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:05:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 22:05:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:12,473 INFO L225 Difference]: With dead ends: 98 [2023-11-21 22:05:12,473 INFO L226 Difference]: Without dead ends: 98 [2023-11-21 22:05:12,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:05:12,475 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 47 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:12,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 391 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:05:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-21 22:05:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-11-21 22:05:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:05:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2023-11-21 22:05:12,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 12 [2023-11-21 22:05:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:12,484 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2023-11-21 22:05:12,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2023-11-21 22:05:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:05:12,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:12,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:12,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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)] Ended with exit code 0 [2023-11-21 22:05:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:12,689 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:12,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -711008909, now seen corresponding path program 1 times [2023-11-21 22:05:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073437112] [2023-11-21 22:05:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:12,691 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 22:05:12,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:12,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:12,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:12,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:05:12,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:12,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:12,897 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 22:05:12,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:12,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:12,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073437112] [2023-11-21 22:05:12,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073437112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:12,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:12,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:05:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123463186] [2023-11-21 22:05:12,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:12,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:12,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:12,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:12,901 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:13,290 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-11-21 22:05:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:05:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:05:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:13,292 INFO L225 Difference]: With dead ends: 97 [2023-11-21 22:05:13,292 INFO L226 Difference]: Without dead ends: 97 [2023-11-21 22:05:13,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:05:13,293 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 34 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:13,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 199 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:05:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-21 22:05:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2023-11-21 22:05:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 77 states have internal predecessors, (92), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:05:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-11-21 22:05:13,300 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 13 [2023-11-21 22:05:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:13,300 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-11-21 22:05:13,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-11-21 22:05:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:05:13,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:13,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:13,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:13,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:13,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:13,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash -711008908, now seen corresponding path program 1 times [2023-11-21 22:05:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783646627] [2023-11-21 22:05:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:13,505 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 22:05:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:13,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:13,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:13,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:05:13,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:13,691 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 22:05:13,783 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 22:05:13,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:13,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783646627] [2023-11-21 22:05:13,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783646627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:05:13,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75514195] [2023-11-21 22:05:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:13,787 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:14,305 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2023-11-21 22:05:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:05:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:05:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:14,313 INFO L225 Difference]: With dead ends: 95 [2023-11-21 22:05:14,313 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 22:05:14,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:05:14,314 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:14,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 209 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:05:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 22:05:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-11-21 22:05:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 77 states have internal predecessors, (88), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:05:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-11-21 22:05:14,322 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 13 [2023-11-21 22:05:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:14,323 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-11-21 22:05:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-11-21 22:05:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:05:14,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:14,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:14,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:14,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:14,529 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:14,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash -379760106, now seen corresponding path program 1 times [2023-11-21 22:05:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172502690] [2023-11-21 22:05:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:14,530 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 22:05:14,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:14,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:14,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 22:05:14,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:14,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:14,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 22:05:14,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 13 [2023-11-21 22:05:14,966 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:05:14,967 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 22:05:15,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-21 22:05:15,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-21 22:05:15,156 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 22:05:15,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:15,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172502690] [2023-11-21 22:05:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172502690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:15,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-21 22:05:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921954912] [2023-11-21 22:05:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:05:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:05:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:15,159 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:16,068 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2023-11-21 22:05:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:05:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:05:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:16,071 INFO L225 Difference]: With dead ends: 112 [2023-11-21 22:05:16,071 INFO L226 Difference]: Without dead ends: 112 [2023-11-21 22:05:16,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:05:16,072 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 288 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:05:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-21 22:05:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2023-11-21 22:05:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.565217391304348) internal successors, (108), 93 states have internal predecessors, (108), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-21 22:05:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-11-21 22:05:16,082 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 15 [2023-11-21 22:05:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:16,082 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-11-21 22:05:16,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-11-21 22:05:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:05:16,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:16,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:16,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:16,288 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:16,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -379760105, now seen corresponding path program 1 times [2023-11-21 22:05:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252865017] [2023-11-21 22:05:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:16,290 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 22:05:16,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:16,291 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 (13)] Waiting until timeout for monitored process [2023-11-21 22:05:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:16,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-21 22:05:16,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:16,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:16,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:05:16,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:16,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:16,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 22:05:16,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 22:05:16,817 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:05:16,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:05:16,848 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:05:16,849 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 22:05:16,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:05:16,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:05:17,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-21 22:05:17,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:05:17,154 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 22:05:17,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:17,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:17,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252865017] [2023-11-21 22:05:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252865017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:17,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-21 22:05:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123084957] [2023-11-21 22:05:17,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:05:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:05:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:17,157 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:18,215 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2023-11-21 22:05:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:05:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:05:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:18,217 INFO L225 Difference]: With dead ends: 109 [2023-11-21 22:05:18,217 INFO L226 Difference]: Without dead ends: 109 [2023-11-21 22:05:18,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:05:18,219 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:18,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 268 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:05:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-21 22:05:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-21 22:05:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 93 states have internal predecessors, (107), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-21 22:05:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-11-21 22:05:18,225 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 15 [2023-11-21 22:05:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:18,226 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-11-21 22:05:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-11-21 22:05:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:05:18,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:18,227 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:18,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:18,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:18,430 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:18,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:18,430 INFO L85 PathProgramCache]: Analyzing trace with hash -817845025, now seen corresponding path program 1 times [2023-11-21 22:05:18,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143335020] [2023-11-21 22:05:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:18,432 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 22:05:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:18,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:18,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 (14)] Waiting until timeout for monitored process [2023-11-21 22:05:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:18,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 22:05:18,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:18,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:18,688 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 22:05:18,748 WARN L876 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (select |c_#length| |create_sub_list_insert_sub_~sub~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base|)))) is different from true [2023-11-21 22:05:18,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 22:05:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:05:18,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:05:18,826 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:05:18,827 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 22:05:18,883 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 22:05:18,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:21,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:21,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143335020] [2023-11-21 22:05:21,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143335020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:21,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247480990] [2023-11-21 22:05:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:21,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 22:05:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 [2023-11-21 22:05:21,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 22:05:21,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-11-21 22:05:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:21,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:05:21,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:21,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:21,735 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 22:05:21,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 22:05:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:05:22,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:05:22,430 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:05:22,430 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 22:05:22,460 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 22:05:22,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:23,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [247480990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:23,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:05:23,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2023-11-21 22:05:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001781739] [2023-11-21 22:05:23,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:05:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:05:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=264, Unknown=2, NotChecked=32, Total=342 [2023-11-21 22:05:23,243 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:05:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:25,355 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2023-11-21 22:05:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:05:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-11-21 22:05:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:25,358 INFO L225 Difference]: With dead ends: 135 [2023-11-21 22:05:25,358 INFO L226 Difference]: Without dead ends: 135 [2023-11-21 22:05:25,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=80, Invalid=474, Unknown=2, NotChecked=44, Total=600 [2023-11-21 22:05:25,359 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:25,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 208 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 607 Invalid, 0 Unknown, 97 Unchecked, 1.6s Time] [2023-11-21 22:05:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-21 22:05:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2023-11-21 22:05:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.52) internal successors, (114), 98 states have internal predecessors, (114), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-21 22:05:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2023-11-21 22:05:25,366 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 23 [2023-11-21 22:05:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:25,367 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2023-11-21 22:05:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:05:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2023-11-21 22:05:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 22:05:25,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:25,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:25,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:25,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt [2023-11-21 22:05:25,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:05:25,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1433720633, now seen corresponding path program 1 times [2023-11-21 22:05:25,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:05:25,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899231711] [2023-11-21 22:05:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:25,779 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 22:05:25,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:05:25,780 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 22:05:25,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/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 (16)] Waiting until timeout for monitored process [2023-11-21 22:05:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:26,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-21 22:05:26,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:26,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:26,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:26,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:26,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 22:05:26,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 22:05:26,490 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-21 22:05:26,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-21 22:05:26,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:05:26,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:05:26,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 [2023-11-21 22:05:26,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 [2023-11-21 22:05:27,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 32 [2023-11-21 22:05:27,875 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2023-11-21 22:05:27,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 92 [2023-11-21 22:05:27,883 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 72 treesize of output 53 [2023-11-21 22:05:27,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:05:28,318 INFO L349 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2023-11-21 22:05:28,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 76 [2023-11-21 22:05:28,641 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-21 22:05:28,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 61 [2023-11-21 22:05:29,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-21 22:05:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:29,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:29,632 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_618) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2023-11-21 22:05:29,653 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_27| (_ BitVec 32)) (v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_617 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_27| v_ArrVal_617) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_27| v_ArrVal_618) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_27|))))) is different from false [2023-11-21 22:05:30,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:05:30,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899231711] [2023-11-21 22:05:30,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899231711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:30,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [858908951] [2023-11-21 22:05:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:30,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 22:05:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 [2023-11-21 22:05:30,703 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 22:05:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb0845c-64bd-488f-9e6b-dde3329f55e0/bin/uautomizer-verify-bycVGegfSx/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-21 22:05:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:31,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-21 22:05:31,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:31,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:05:31,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:31,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:31,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 22:05:31,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 22:05:31,549 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-21 22:05:31,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-21 22:05:31,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:05:31,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:05:31,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 [2023-11-21 22:05:31,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 [2023-11-21 22:05:32,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:05:32,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 32 [2023-11-21 22:05:32,269 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2023-11-21 22:05:32,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 92 [2023-11-21 22:05:32,283 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 84 treesize of output 61 [2023-11-21 22:05:34,800 INFO L349 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2023-11-21 22:05:34,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 76 [2023-11-21 22:05:37,139 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-21 22:05:37,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 86 [2023-11-21 22:05:37,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-21 22:05:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:37,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:38,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [858908951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:38,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:05:38,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2023-11-21 22:05:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487682157] [2023-11-21 22:05:38,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:05:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:05:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:05:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=708, Unknown=24, NotChecked=110, Total=930 [2023-11-21 22:05:38,983 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:05:43,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:05:45,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]