./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme --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 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:14,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:14,643 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:59:14,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:14,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:14,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:14,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:14,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:14,692 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:14,698 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:14,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:14,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:14,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:14,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:14,702 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:14,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:14,703 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:14,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:14,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:14,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:14,705 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:59:14,706 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:59:14,706 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:59:14,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:14,707 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:59:14,708 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:59:14,708 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:14,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:14,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:14,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:14,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:14,725 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:14,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:14,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:14,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:14,726 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:14,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:14,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:14,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:14,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:14,728 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:14,728 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_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2023-11-26 11:59:15,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:15,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:15,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:15,092 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:15,092 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:15,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2023-11-26 11:59:18,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:18,730 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:18,731 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2023-11-26 11:59:18,750 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data/af309d7a5/456d8c2eaebf4c218baf2c727e17579f/FLAGafda304ca [2023-11-26 11:59:18,767 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data/af309d7a5/456d8c2eaebf4c218baf2c727e17579f [2023-11-26 11:59:18,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:18,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:18,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:18,784 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:18,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:18,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:18" (1/1) ... [2023-11-26 11:59:18,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a320848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:18, skipping insertion in model container [2023-11-26 11:59:18,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:18" (1/1) ... [2023-11-26 11:59:18,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:19,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:19,398 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) [2023-11-26 11:59:19,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53a7d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:19, skipping insertion in model container [2023-11-26 11:59:19,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:19,400 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 11:59:19,402 INFO L158 Benchmark]: Toolchain (without parser) took 628.62ms. Allocated memory is still 109.1MB. Free memory was 65.5MB in the beginning and 51.2MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-26 11:59:19,403 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:59:19,404 INFO L158 Benchmark]: CACSL2BoogieTranslator took 617.32ms. Allocated memory is still 109.1MB. Free memory was 65.1MB in the beginning and 51.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-26 11:59:19,405 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 617.32ms. Allocated memory is still 109.1MB. Free memory was 65.1MB in the beginning and 51.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme --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 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:21,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:22,105 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 11:59:22,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:22,115 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:22,162 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:22,163 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:22,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:22,164 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:22,170 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:22,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:22,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:22,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:22,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:22,174 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:22,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:22,175 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:22,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:22,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:22,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:22,177 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:59:22,177 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:59:22,178 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:59:22,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:22,179 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:59:22,179 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 11:59:22,180 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 11:59:22,180 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:59:22,181 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:22,181 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:22,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:22,184 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:22,184 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:22,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:22,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:22,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:22,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:22,186 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 11:59:22,187 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 11:59:22,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:22,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:22,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:22,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:22,188 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 11:59:22,189 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_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2023-11-26 11:59:22,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:22,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:22,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:22,658 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:22,659 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:22,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2023-11-26 11:59:25,800 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:26,264 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:26,264 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2023-11-26 11:59:26,293 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data/43bc8dbcc/8f202769131c4ee8b4b303563e95de05/FLAG2eb799cf2 [2023-11-26 11:59:26,316 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/data/43bc8dbcc/8f202769131c4ee8b4b303563e95de05 [2023-11-26 11:59:26,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:26,324 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:26,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:26,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:26,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:26,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:26" (1/1) ... [2023-11-26 11:59:26,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e375fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:26, skipping insertion in model container [2023-11-26 11:59:26,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:26" (1/1) ... [2023-11-26 11:59:26,391 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:26,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:27,021 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 11:59:27,038 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:27,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:27,169 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:27,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:27,345 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:27,353 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:27,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27 WrapperNode [2023-11-26 11:59:27,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:27,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:27,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:27,356 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:27,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,448 INFO L138 Inliner]: procedures = 167, calls = 78, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 85 [2023-11-26 11:59:27,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:27,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:27,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:27,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:27,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,478 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,504 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-11-26 11:59:27,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,537 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:27,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:27,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:27,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:27,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (1/1) ... [2023-11-26 11:59:27,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:27,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:27,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-26 11:59:27,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-26 11:59:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:59:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:59:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:59:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:59:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:59:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:59:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:59:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:59:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:27,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:27,770 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:27,772 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:28,130 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:28,173 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:28,173 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:59:28,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:28 BoogieIcfgContainer [2023-11-26 11:59:28,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:28,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:28,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:28,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:28,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:26" (1/3) ... [2023-11-26 11:59:28,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d86ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:28, skipping insertion in model container [2023-11-26 11:59:28,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:27" (2/3) ... [2023-11-26 11:59:28,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d86ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:28, skipping insertion in model container [2023-11-26 11:59:28,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:28" (3/3) ... [2023-11-26 11:59:28,183 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-1.i [2023-11-26 11:59:28,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:28,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-26 11:59:28,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:28,274 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;@6d5a1a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:28,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-26 11:59:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 31 states have (on average 1.935483870967742) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:59:28,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:28,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1304835890, now seen corresponding path program 1 times [2023-11-26 11:59:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382723200] [2023-11-26 11:59:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,326 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 [2023-11-26 11:59:28,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:28,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:28,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:28,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:59:28,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:28,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:28,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382723200] [2023-11-26 11:59:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382723200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:28,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:28,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536637355] [2023-11-26 11:59:28,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:28,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:28,639 INFO L87 Difference]: Start difference. First operand has 53 states, 31 states have (on average 1.935483870967742) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,835 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2023-11-26 11:59:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:59:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,847 INFO L225 Difference]: With dead ends: 98 [2023-11-26 11:59:28,847 INFO L226 Difference]: Without dead ends: 97 [2023-11-26 11:59:28,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:28,853 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 173 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-26 11:59:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2023-11-26 11:59:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:59:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-11-26 11:59:28,897 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 10 [2023-11-26 11:59:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,897 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-11-26 11:59:28,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-11-26 11:59:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:59:28,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-26 11:59:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:29,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:29,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1304834964, now seen corresponding path program 1 times [2023-11-26 11:59:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:29,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770496776] [2023-11-26 11:59:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,103 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 [2023-11-26 11:59:29,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:29,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:29,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:29,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:29,253 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 [2023-11-26 11:59:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:29,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:29,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770496776] [2023-11-26 11:59:29,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770496776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470858577] [2023-11-26 11:59:29,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:29,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:29,329 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:29,540 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2023-11-26 11:59:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:59:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:29,543 INFO L225 Difference]: With dead ends: 90 [2023-11-26 11:59:29,543 INFO L226 Difference]: Without dead ends: 90 [2023-11-26 11:59:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:29,545 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:29,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 133 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-26 11:59:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2023-11-26 11:59:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.673913043478261) internal successors, (77), 63 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:59:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-26 11:59:29,561 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 10 [2023-11-26 11:59:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:29,562 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-26 11:59:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-26 11:59:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:59:29,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:29,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:29,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:29,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:29,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:29,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1304834965, now seen corresponding path program 1 times [2023-11-26 11:59:29,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719223970] [2023-11-26 11:59:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,768 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 [2023-11-26 11:59:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:29,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:29,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:59:29,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:29,884 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 [2023-11-26 11:59:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:30,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:30,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:30,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719223970] [2023-11-26 11:59:30,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719223970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:30,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:30,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:59:30,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902238822] [2023-11-26 11:59:30,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:30,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:59:30,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:59:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:30,044 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:30,558 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2023-11-26 11:59:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:59:30,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:59:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:30,562 INFO L225 Difference]: With dead ends: 112 [2023-11-26 11:59:30,562 INFO L226 Difference]: Without dead ends: 112 [2023-11-26 11:59:30,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:59:30,564 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 94 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:30,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 329 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:59:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-26 11:59:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2023-11-26 11:59:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.676056338028169) internal successors, (119), 88 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:59:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2023-11-26 11:59:30,590 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 10 [2023-11-26 11:59:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:30,590 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2023-11-26 11:59:30,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2023-11-26 11:59:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:59:30,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:30,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:30,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:30,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:30,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:30,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2102627725, now seen corresponding path program 1 times [2023-11-26 11:59:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:30,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164912516] [2023-11-26 11:59:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:30,796 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 [2023-11-26 11:59:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:30,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:30,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:30,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:59:30,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:30,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:30,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:30,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164912516] [2023-11-26 11:59:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164912516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:30,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:30,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071657813] [2023-11-26 11:59:30,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:30,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:30,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:30,892 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:31,059 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2023-11-26 11:59:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:59:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:31,064 INFO L225 Difference]: With dead ends: 134 [2023-11-26 11:59:31,064 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 11:59:31,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:31,065 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:31,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 132 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 11:59:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2023-11-26 11:59:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.6619718309859155) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:59:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2023-11-26 11:59:31,091 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 10 [2023-11-26 11:59:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:31,091 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2023-11-26 11:59:31,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2023-11-26 11:59:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:59:31,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:31,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:31,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-26 11:59:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:31,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:31,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2102628651, now seen corresponding path program 1 times [2023-11-26 11:59:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:31,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401357166] [2023-11-26 11:59:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:31,296 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 [2023-11-26 11:59:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:31,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:31,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:31,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:59:31,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:31,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:31,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:31,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401357166] [2023-11-26 11:59:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401357166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:31,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:31,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:31,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438799045] [2023-11-26 11:59:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:31,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:31,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:31,428 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:31,518 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2023-11-26 11:59:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:59:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:31,519 INFO L225 Difference]: With dead ends: 79 [2023-11-26 11:59:31,520 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 11:59:31,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:31,521 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:31,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 199 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 11:59:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-26 11:59:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 73 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2023-11-26 11:59:31,530 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 10 [2023-11-26 11:59:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:31,530 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2023-11-26 11:59:31,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2023-11-26 11:59:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:59:31,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:31,532 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:31,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:31,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:31,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:31,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash -183956072, now seen corresponding path program 1 times [2023-11-26 11:59:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:31,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503319710] [2023-11-26 11:59:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:31,746 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 [2023-11-26 11:59:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:31,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:31,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:31,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:59:31,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:31,882 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 [2023-11-26 11:59:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:32,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:32,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503319710] [2023-11-26 11:59:32,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503319710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:32,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:32,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-26 11:59:32,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605618694] [2023-11-26 11:59:32,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:32,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:59:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:59:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:32,990 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:34,661 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2023-11-26 11:59:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:59:34,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2023-11-26 11:59:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:34,664 INFO L225 Difference]: With dead ends: 179 [2023-11-26 11:59:34,665 INFO L226 Difference]: Without dead ends: 179 [2023-11-26 11:59:34,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:59:34,666 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 481 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:34,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 293 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:59:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-26 11:59:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2023-11-26 11:59:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2023-11-26 11:59:34,677 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 12 [2023-11-26 11:59:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:34,677 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2023-11-26 11:59:34,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2023-11-26 11:59:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:59:34,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:34,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:34,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:34,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:34,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1610582391, now seen corresponding path program 1 times [2023-11-26 11:59:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542095895] [2023-11-26 11:59:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:34,886 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 [2023-11-26 11:59:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:34,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:34,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:34,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:34,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:35,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:35,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:35,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542095895] [2023-11-26 11:59:35,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542095895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:35,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:35,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:59:35,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235873642] [2023-11-26 11:59:35,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:35,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:59:35,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:59:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:35,165 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:35,414 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2023-11-26 11:59:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:59:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-26 11:59:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:35,416 INFO L225 Difference]: With dead ends: 87 [2023-11-26 11:59:35,416 INFO L226 Difference]: Without dead ends: 87 [2023-11-26 11:59:35,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:35,418 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:35,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 183 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-26 11:59:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2023-11-26 11:59:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.6) internal successors, (104), 82 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-11-26 11:59:35,429 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 18 [2023-11-26 11:59:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:35,430 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-11-26 11:59:35,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-11-26 11:59:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:59:35,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:35,431 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:35,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:35,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:35,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:35,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1750572833, now seen corresponding path program 2 times [2023-11-26 11:59:35,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:35,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186738648] [2023-11-26 11:59:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:35,638 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 [2023-11-26 11:59:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:35,639 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:35,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:35,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:35,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:35,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:59:35,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:35,767 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 [2023-11-26 11:59:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:36,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:38,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186738648] [2023-11-26 11:59:38,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186738648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:38,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:38,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-26 11:59:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523992157] [2023-11-26 11:59:38,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:38,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:59:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:59:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:59:38,051 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:42,515 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2023-11-26 11:59:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:59:42,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-26 11:59:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:42,518 INFO L225 Difference]: With dead ends: 113 [2023-11-26 11:59:42,518 INFO L226 Difference]: Without dead ends: 113 [2023-11-26 11:59:42,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 11:59:42,520 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 325 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:42,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 507 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 11:59:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-26 11:59:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2023-11-26 11:59:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 91 states have internal predecessors, (116), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2023-11-26 11:59:42,528 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 18 [2023-11-26 11:59:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:42,528 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2023-11-26 11:59:42,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2023-11-26 11:59:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:59:42,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:42,530 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:42,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:42,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:42,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:42,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash 157460739, now seen corresponding path program 2 times [2023-11-26 11:59:42,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:42,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352615854] [2023-11-26 11:59:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:42,735 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 [2023-11-26 11:59:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:42,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:42,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:59:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:42,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:42,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-26 11:59:42,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:42,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352615854] [2023-11-26 11:59:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352615854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:42,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:42,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607418880] [2023-11-26 11:59:42,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:42,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:42,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:42,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:42,870 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:42,962 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2023-11-26 11:59:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-26 11:59:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:42,964 INFO L225 Difference]: With dead ends: 92 [2023-11-26 11:59:42,964 INFO L226 Difference]: Without dead ends: 92 [2023-11-26 11:59:42,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:42,965 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:42,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 96 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-26 11:59:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2023-11-26 11:59:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.490566037735849) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-11-26 11:59:42,971 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 26 [2023-11-26 11:59:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:42,976 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-11-26 11:59:42,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-11-26 11:59:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 11:59:42,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:42,981 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:42,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:43,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:43,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 6156280, now seen corresponding path program 1 times [2023-11-26 11:59:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:43,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226211172] [2023-11-26 11:59:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:43,185 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 [2023-11-26 11:59:43,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:43,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:43,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:43,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:59:43,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:43,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:43,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:43,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226211172] [2023-11-26 11:59:43,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226211172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:43,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:43,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-26 11:59:43,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925521402] [2023-11-26 11:59:43,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:43,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:59:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:43,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:59:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:59:43,916 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:59:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:44,415 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-11-26 11:59:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:59:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-11-26 11:59:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:44,417 INFO L225 Difference]: With dead ends: 74 [2023-11-26 11:59:44,417 INFO L226 Difference]: Without dead ends: 74 [2023-11-26 11:59:44,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:59:44,418 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:44,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 398 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:59:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-26 11:59:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-26 11:59:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 70 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-11-26 11:59:44,423 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 31 [2023-11-26 11:59:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:44,423 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-11-26 11:59:44,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:59:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-11-26 11:59:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:59:44,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:44,425 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:44,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:44,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:44,625 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:44,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash 688304627, now seen corresponding path program 3 times [2023-11-26 11:59:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:44,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393674171] [2023-11-26 11:59:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:59:44,627 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 [2023-11-26 11:59:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:44,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:44,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:44,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-26 11:59:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:44,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:59:44,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:44,888 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 [2023-11-26 11:59:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:45,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:49,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393674171] [2023-11-26 11:59:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393674171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:49,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:49,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2023-11-26 11:59:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397478806] [2023-11-26 11:59:49,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-26 11:59:49,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-26 11:59:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 11:59:49,607 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 35 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:54,298 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2023-11-26 11:59:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:59:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-26 11:59:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:54,300 INFO L225 Difference]: With dead ends: 110 [2023-11-26 11:59:54,300 INFO L226 Difference]: Without dead ends: 110 [2023-11-26 11:59:54,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2023-11-26 11:59:54,302 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 686 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:54,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 589 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-26 11:59:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-26 11:59:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2023-11-26 11:59:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 68 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-11-26 11:59:54,307 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 30 [2023-11-26 11:59:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:54,307 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-11-26 11:59:54,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-11-26 11:59:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 11:59:54,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:54,309 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:54,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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)] Ended with exit code 0 [2023-11-26 11:59:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:54,513 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:54,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1351578604, now seen corresponding path program 2 times [2023-11-26 11:59:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199150886] [2023-11-26 11:59:54,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:54,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:59:54,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:54,515 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:54,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:54,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:54,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:54,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:59:54,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:54,705 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 [2023-11-26 11:59:54,809 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-11-26 11:59:54,836 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:59:54,836 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 [2023-11-26 11:59:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 2 not checked. [2023-11-26 11:59:54,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 11:59:55,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:59:55,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199150886] [2023-11-26 11:59:55,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199150886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:55,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:55,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2023-11-26 11:59:55,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118540851] [2023-11-26 11:59:55,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:55,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:55,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:59:55,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:55,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2023-11-26 11:59:55,119 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:55,464 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2023-11-26 11:59:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:59:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-11-26 11:59:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:55,466 INFO L225 Difference]: With dead ends: 97 [2023-11-26 11:59:55,466 INFO L226 Difference]: Without dead ends: 97 [2023-11-26 11:59:55,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-11-26 11:59:55,467 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:55,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 185 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2023-11-26 11:59:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-26 11:59:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2023-11-26 11:59:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.4) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-11-26 11:59:55,477 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 39 [2023-11-26 11:59:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:55,477 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-11-26 11:59:55,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-11-26 11:59:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 11:59:55,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:55,478 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:55,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:55,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 11:59:55,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1351578605, now seen corresponding path program 1 times [2023-11-26 11:59:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:59:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524628186] [2023-11-26 11:59:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:55,680 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 [2023-11-26 11:59:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:59:55,681 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 11:59:55,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 11:59:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:55,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:59:55,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:55,910 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 [2023-11-26 11:59:55,918 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 [2023-11-26 11:59:56,327 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-26 11:59:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:59:56,351 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 [2023-11-26 11:59:56,363 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-26 11:59:56,363 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 [2023-11-26 11:59:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 2 not checked. [2023-11-26 11:59:56,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:00,689 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul (_ bv4 32) |c_ULTIMATE.start_alloc_unsafe_17_~i~0#1|))) (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_alloc_unsafe_17_~array#1.offset| .cse1))) (and (forall ((|v_ldv_malloc_#res.base_38| (_ BitVec 32))) (or (forall ((v_ArrVal_340 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ldv_malloc_#res.base_38| v_ArrVal_340) |c_ULTIMATE.start_alloc_unsafe_17_~array#1.base|))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_38|) (_ bv0 1))))) (or (bvule (bvadd |c_ULTIMATE.start_alloc_unsafe_17_~array#1.offset| .cse1) .cse0) (forall ((|v_ldv_malloc_#res.base_38| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_38|) (_ bv0 1)))))))) is different from false [2023-11-26 12:00:00,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 12:00:00,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524628186] [2023-11-26 12:00:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524628186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:00,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [131370470] [2023-11-26 12:00:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:00,699 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-26 12:00:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/cvc4 [2023-11-26 12:00:00,700 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-26 12:00:00,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-11-26 12:00:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:01,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 12:00:01,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:01,106 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 [2023-11-26 12:00:01,112 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 [2023-11-26 12:00:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:00:01,474 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 [2023-11-26 12:00:01,490 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-26 12:00:01,490 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 [2023-11-26 12:00:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 2 not checked. [2023-11-26 12:00:01,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [131370470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:01,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2023-11-26 12:00:01,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429670564] [2023-11-26 12:00:01,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 12:00:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 12:00:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 12:00:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=109, Unknown=2, NotChecked=42, Total=182 [2023-11-26 12:00:01,862 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:02,742 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2023-11-26 12:00:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:00:02,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-11-26 12:00:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:02,744 INFO L225 Difference]: With dead ends: 144 [2023-11-26 12:00:02,744 INFO L226 Difference]: Without dead ends: 144 [2023-11-26 12:00:02,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=69, Invalid=279, Unknown=2, NotChecked=70, Total=420 [2023-11-26 12:00:02,746 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 142 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:02,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 306 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 301 Invalid, 0 Unknown, 130 Unchecked, 0.6s Time] [2023-11-26 12:00:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-26 12:00:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2023-11-26 12:00:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 90 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 12:00:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2023-11-26 12:00:02,751 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 39 [2023-11-26 12:00:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:02,752 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2023-11-26 12:00:02,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2023-11-26 12:00:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 12:00:02,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:02,753 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:02,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:02,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:03,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:03,159 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 12:00:03,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1786864248, now seen corresponding path program 1 times [2023-11-26 12:00:03,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 12:00:03,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371014101] [2023-11-26 12:00:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,160 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 [2023-11-26 12:00:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 12:00:03,161 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 12:00:03,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:03,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:00:03,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-26 12:00:03,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:03,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 12:00:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371014101] [2023-11-26 12:00:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371014101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:03,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:00:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828851954] [2023-11-26 12:00:03,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:03,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:00:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 12:00:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:00:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:03,364 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 12:00:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:03,451 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2023-11-26 12:00:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-11-26 12:00:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:03,453 INFO L225 Difference]: With dead ends: 120 [2023-11-26 12:00:03,453 INFO L226 Difference]: Without dead ends: 120 [2023-11-26 12:00:03,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:03,454 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:03,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 193 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-26 12:00:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2023-11-26 12:00:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 91 states have internal predecessors, (108), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 12:00:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2023-11-26 12:00:03,460 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 41 [2023-11-26 12:00:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:03,460 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2023-11-26 12:00:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 12:00:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2023-11-26 12:00:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 12:00:03,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:03,462 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:03,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:03,666 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 12:00:03,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:03,666 INFO L85 PathProgramCache]: Analyzing trace with hash -765292713, now seen corresponding path program 1 times [2023-11-26 12:00:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 12:00:03,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184481958] [2023-11-26 12:00:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,667 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 [2023-11-26 12:00:03,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 12:00:03,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 12:00:03,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (17)] Waiting until timeout for monitored process [2023-11-26 12:00:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:03,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:00:03,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-26 12:00:03,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:03,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 12:00:03,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184481958] [2023-11-26 12:00:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184481958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:03,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:03,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:00:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950152881] [2023-11-26 12:00:03,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 12:00:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:03,874 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:03,974 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2023-11-26 12:00:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-11-26 12:00:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:03,976 INFO L225 Difference]: With dead ends: 102 [2023-11-26 12:00:03,977 INFO L226 Difference]: Without dead ends: 102 [2023-11-26 12:00:03,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:03,977 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:03,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 134 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-26 12:00:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-11-26 12:00:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.375) internal successors, (110), 93 states have internal predecessors, (110), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 12:00:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2023-11-26 12:00:03,983 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 41 [2023-11-26 12:00:03,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:03,983 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2023-11-26 12:00:03,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:03,983 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2023-11-26 12:00:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:00:03,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:03,984 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:03,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (17)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:04,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:04,185 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 12:00:04,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:04,186 INFO L85 PathProgramCache]: Analyzing trace with hash -689254386, now seen corresponding path program 1 times [2023-11-26 12:00:04,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 12:00:04,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503589662] [2023-11-26 12:00:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:04,186 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 [2023-11-26 12:00:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 12:00:04,188 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 12:00:04,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (18)] Waiting until timeout for monitored process [2023-11-26 12:00:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:04,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:04,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-26 12:00:04,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-26 12:00:04,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 12:00:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503589662] [2023-11-26 12:00:04,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503589662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:04,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:04,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 12:00:04,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806304194] [2023-11-26 12:00:04,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:04,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 12:00:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:04,593 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:00:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:04,828 INFO L93 Difference]: Finished difference Result 184 states and 230 transitions. [2023-11-26 12:00:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:00:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-11-26 12:00:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:04,831 INFO L225 Difference]: With dead ends: 184 [2023-11-26 12:00:04,831 INFO L226 Difference]: Without dead ends: 184 [2023-11-26 12:00:04,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:04,832 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 277 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:04,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 174 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-26 12:00:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 127. [2023-11-26 12:00:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 102 states have (on average 1.3725490196078431) internal successors, (140), 113 states have internal predecessors, (140), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-26 12:00:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2023-11-26 12:00:04,843 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 43 [2023-11-26 12:00:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:04,844 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2023-11-26 12:00:04,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:00:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2023-11-26 12:00:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:00:04,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:04,847 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:04,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (18)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:05,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:05,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 12:00:05,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1006891532, now seen corresponding path program 1 times [2023-11-26 12:00:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 12:00:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510065371] [2023-11-26 12:00:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,052 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 [2023-11-26 12:00:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 12:00:05,053 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 12:00:05,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (19)] Waiting until timeout for monitored process [2023-11-26 12:00:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:00:05,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:05,212 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 [2023-11-26 12:00:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 12:00:05,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 12:00:05,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 12:00:05,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510065371] [2023-11-26 12:00:05,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510065371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:05,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:05,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-11-26 12:00:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479201091] [2023-11-26 12:00:05,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 12:00:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:05,517 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 12:00:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:05,784 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2023-11-26 12:00:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-26 12:00:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:05,786 INFO L225 Difference]: With dead ends: 144 [2023-11-26 12:00:05,786 INFO L226 Difference]: Without dead ends: 144 [2023-11-26 12:00:05,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:05,787 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 40 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:05,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-26 12:00:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2023-11-26 12:00:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 114 states have internal predecessors, (142), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-26 12:00:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 165 transitions. [2023-11-26 12:00:05,794 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 165 transitions. Word has length 43 [2023-11-26 12:00:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:05,795 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 165 transitions. [2023-11-26 12:00:05,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 12:00:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 165 transitions. [2023-11-26 12:00:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:00:05,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:05,796 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (19)] Ended with exit code 0 [2023-11-26 12:00:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:06,000 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 12:00:06,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1006891531, now seen corresponding path program 1 times [2023-11-26 12:00:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 12:00:06,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745054696] [2023-11-26 12:00:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:06,001 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 [2023-11-26 12:00:06,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 12:00:06,003 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 12:00:06,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (20)] Waiting until timeout for monitored process [2023-11-26 12:00:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 12:00:06,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:06,194 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 [2023-11-26 12:00:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 12:00:06,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 12:00:07,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 12:00:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745054696] [2023-11-26 12:00:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745054696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:07,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:07,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-26 12:00:07,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908710680] [2023-11-26 12:00:07,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:00:07,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 12:00:07,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:00:07,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:00:07,549 INFO L87 Difference]: Start difference. First operand 128 states and 165 transitions. Second operand has 16 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:00:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:08,978 INFO L93 Difference]: Finished difference Result 175 states and 217 transitions. [2023-11-26 12:00:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:00:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-11-26 12:00:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:08,980 INFO L225 Difference]: With dead ends: 175 [2023-11-26 12:00:08,981 INFO L226 Difference]: Without dead ends: 175 [2023-11-26 12:00:08,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:00:08,982 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 157 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:08,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 395 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 12:00:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-26 12:00:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 150. [2023-11-26 12:00:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 125 states have (on average 1.472) internal successors, (184), 136 states have internal predecessors, (184), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-26 12:00:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 207 transitions. [2023-11-26 12:00:08,990 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 207 transitions. Word has length 43 [2023-11-26 12:00:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:08,995 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 207 transitions. [2023-11-26 12:00:08,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:00:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 207 transitions. [2023-11-26 12:00:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 12:00:08,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:08,998 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:09,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (20)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 [2023-11-26 12:00:09,202 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-26 12:00:09,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1148866358, now seen corresponding path program 1 times [2023-11-26 12:00:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 12:00:09,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479578931] [2023-11-26 12:00:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:09,203 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 [2023-11-26 12:00:09,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 12:00:09,204 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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) [2023-11-26 12:00:09,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab861400-028a-47ae-93eb-b68e1b8802ac/bin/uautomizer-verify-VRDe98Ueme/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 (21)] Waiting until timeout for monitored process [2023-11-26 12:00:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:09,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-26 12:00:09,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:09,461 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 [2023-11-26 12:00:09,489 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 27 treesize of output 11 [2023-11-26 12:00:09,552 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 27 treesize of output 11 [2023-11-26 12:00:09,597 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 27 treesize of output 11 [2023-11-26 12:00:09,653 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 27 treesize of output 11 [2023-11-26 12:00:09,695 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 27 treesize of output 11 [2023-11-26 12:00:09,736 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 27 treesize of output 11 [2023-11-26 12:00:09,780 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 27 treesize of output 11 [2023-11-26 12:00:09,829 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 27 treesize of output 11 [2023-11-26 12:00:09,872 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 27 treesize of output 11 [2023-11-26 12:00:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:10,081 INFO L327 TraceCheckSpWp]: Computing backward predicates...