./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:38:02,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:38:02,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:38:02,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:38:02,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:38:02,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:38:02,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:38:02,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:38:02,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:38:02,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:38:02,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:38:02,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:38:02,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:38:02,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:38:02,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:38:02,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:38:02,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:38:02,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:38:02,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:38:02,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:38:02,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:38:02,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:38:02,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:38:02,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:38:02,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:38:02,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:38:02,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:38:02,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:38:02,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:38:02,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:38:02,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:38:02,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:38:02,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:38:02,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:38:02,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:38:02,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:38:02,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:38:02,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:38:02,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:38:02,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:38:02,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:38:02,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:38:02,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:38:02,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:38:02,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:38:02,293 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:38:02,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:38:02,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:38:02,298 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:38:02,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:38:02,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:38:02,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:38:02,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:38:02,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:38:02,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:38:02,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:38:02,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:38:02,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:38:02,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:38:02,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:38:02,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:38:02,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:38:02,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:38:02,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:38:02,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:38:02,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:38:02,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:38:02,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:38:02,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:38:02,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:38:02,304 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:38:02,304 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:38:02,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:38:02,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:38:02,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 [2021-11-23 12:38:02,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:38:02,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:38:02,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:38:02,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:38:02,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:38:02,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-11-23 12:38:02,712 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/daddcbf5e/87d87914994e49af8531250f7f30f8d2/FLAGbf54a58c8 [2021-11-23 12:38:03,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:38:03,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-11-23 12:38:03,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/daddcbf5e/87d87914994e49af8531250f7f30f8d2/FLAGbf54a58c8 [2021-11-23 12:38:03,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/daddcbf5e/87d87914994e49af8531250f7f30f8d2 [2021-11-23 12:38:03,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:38:03,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:38:03,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:38:03,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:38:03,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:38:03,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:38:03" (1/1) ... [2021-11-23 12:38:03,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450ff967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:03, skipping insertion in model container [2021-11-23 12:38:03,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:38:03" (1/1) ... [2021-11-23 12:38:03,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:38:03,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:38:03,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-11-23 12:38:03,975 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-11-23 12:38:03,976 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-11-23 12:38:03,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-11-23 12:38:03,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-11-23 12:38:03,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-11-23 12:38:03,981 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-11-23 12:38:03,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:38:03,994 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:38:04,032 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-11-23 12:38:04,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-11-23 12:38:04,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-11-23 12:38:04,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-11-23 12:38:04,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-11-23 12:38:04,038 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-11-23 12:38:04,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-11-23 12:38:04,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:38:04,071 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:38:04,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04 WrapperNode [2021-11-23 12:38:04,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:38:04,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:38:04,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:38:04,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:38:04,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,123 INFO L137 Inliner]: procedures = 119, calls = 39, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 150 [2021-11-23 12:38:04,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:38:04,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:38:04,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:38:04,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:38:04,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:38:04,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:38:04,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:38:04,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:38:04,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (1/1) ... [2021-11-23 12:38:04,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:38:04,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:38:04,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:38:04,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:38:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:38:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:38:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:38:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:38:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:38:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:38:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:38:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:38:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:38:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:38:04,433 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:38:04,435 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:38:04,685 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:38:04,691 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:38:04,691 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-23 12:38:04,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:38:04 BoogieIcfgContainer [2021-11-23 12:38:04,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:38:04,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:38:04,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:38:04,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:38:04,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:38:03" (1/3) ... [2021-11-23 12:38:04,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2553d406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:38:04, skipping insertion in model container [2021-11-23 12:38:04,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:04" (2/3) ... [2021-11-23 12:38:04,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2553d406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:38:04, skipping insertion in model container [2021-11-23 12:38:04,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:38:04" (3/3) ... [2021-11-23 12:38:04,712 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2021-11-23 12:38:04,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:38:04,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 12:38:04,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:38:04,799 INFO L339 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:38:04,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 12:38:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:38:04,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:04,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:38:04,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash 891600134, now seen corresponding path program 1 times [2021-11-23 12:38:04,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434425660] [2021-11-23 12:38:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:04,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:05,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434425660] [2021-11-23 12:38:05,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434425660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:05,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:05,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:38:05,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53641446] [2021-11-23 12:38:05,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:05,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:38:05,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:38:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:38:05,106 INFO L87 Difference]: Start difference. First operand has 47 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:05,129 INFO L93 Difference]: Finished difference Result 92 states and 150 transitions. [2021-11-23 12:38:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:38:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:38:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:05,141 INFO L225 Difference]: With dead ends: 92 [2021-11-23 12:38:05,141 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 12:38:05,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:38:05,149 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:05,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:38:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 12:38:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 12:38:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-23 12:38:05,190 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 6 [2021-11-23 12:38:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:05,191 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-23 12:38:05,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-23 12:38:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:38:05,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:05,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:05,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:38:05,193 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1806905862, now seen corresponding path program 1 times [2021-11-23 12:38:05,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:05,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996148644] [2021-11-23 12:38:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:05,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:05,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996148644] [2021-11-23 12:38:05,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996148644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:05,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:05,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:38:05,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003071937] [2021-11-23 12:38:05,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:05,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:38:05,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:38:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:38:05,331 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:05,420 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-23 12:38:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:38:05,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:38:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:05,422 INFO L225 Difference]: With dead ends: 44 [2021-11-23 12:38:05,423 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:38:05,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:05,425 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:05,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:38:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:38:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-11-23 12:38:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-23 12:38:05,434 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 7 [2021-11-23 12:38:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:05,435 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-23 12:38:05,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-23 12:38:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:38:05,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:05,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:05,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:38:05,437 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:05,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:05,438 INFO L85 PathProgramCache]: Analyzing trace with hash 179566605, now seen corresponding path program 1 times [2021-11-23 12:38:05,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:05,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151397974] [2021-11-23 12:38:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:05,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:05,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:05,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151397974] [2021-11-23 12:38:05,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151397974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:05,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:05,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:38:05,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404419035] [2021-11-23 12:38:05,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:05,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:38:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:38:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:38:05,548 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:05,620 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-23 12:38:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:38:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 12:38:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:05,621 INFO L225 Difference]: With dead ends: 37 [2021-11-23 12:38:05,622 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 12:38:05,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:05,624 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:05,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:38:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 12:38:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 12:38:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-23 12:38:05,634 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 8 [2021-11-23 12:38:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:05,634 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-23 12:38:05,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-23 12:38:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:38:05,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:05,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:05,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:38:05,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash 711412120, now seen corresponding path program 1 times [2021-11-23 12:38:05,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:05,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755377044] [2021-11-23 12:38:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:05,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:05,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755377044] [2021-11-23 12:38:05,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755377044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:05,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:05,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:38:05,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008364389] [2021-11-23 12:38:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:05,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:38:05,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:38:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:05,718 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:05,897 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-23 12:38:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:38:05,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:38:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:05,908 INFO L225 Difference]: With dead ends: 60 [2021-11-23 12:38:05,908 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 12:38:05,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:38:05,910 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:05,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 88 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:38:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 12:38:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-11-23 12:38:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-23 12:38:05,934 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 10 [2021-11-23 12:38:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:05,935 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-23 12:38:05,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-23 12:38:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:38:05,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:05,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:05,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:38:05,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2056579816, now seen corresponding path program 1 times [2021-11-23 12:38:05,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:05,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721674671] [2021-11-23 12:38:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:05,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:06,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:06,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721674671] [2021-11-23 12:38:06,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721674671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:06,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:06,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:38:06,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018840731] [2021-11-23 12:38:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:06,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:38:06,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:38:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:38:06,095 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:06,198 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-23 12:38:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:38:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:38:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:06,203 INFO L225 Difference]: With dead ends: 42 [2021-11-23 12:38:06,203 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:38:06,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:06,205 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:06,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:38:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:38:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 12:38:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-23 12:38:06,246 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 11 [2021-11-23 12:38:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-23 12:38:06,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-23 12:38:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:38:06,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:06,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:38:06,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1285114177, now seen corresponding path program 1 times [2021-11-23 12:38:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931518459] [2021-11-23 12:38:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:06,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:06,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:06,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931518459] [2021-11-23 12:38:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931518459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:06,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:06,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:38:06,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929738947] [2021-11-23 12:38:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:38:06,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:38:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:06,376 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:06,495 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-23 12:38:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:38:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:38:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:06,497 INFO L225 Difference]: With dead ends: 55 [2021-11-23 12:38:06,497 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 12:38:06,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:38:06,499 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:06,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:38:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 12:38:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-23 12:38:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-23 12:38:06,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 14 [2021-11-23 12:38:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:06,506 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-23 12:38:06,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-23 12:38:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:38:06,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:06,507 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:06,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:38:06,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1621160418, now seen corresponding path program 1 times [2021-11-23 12:38:06,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:06,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132381490] [2021-11-23 12:38:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:06,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:06,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:06,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132381490] [2021-11-23 12:38:06,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132381490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:38:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625400326] [2021-11-23 12:38:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:06,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:38:06,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:38:06,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:38:06,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:38:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:38:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:06,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:06,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 12:38:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:06,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 12:38:07,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:38:07,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-23 12:38:07,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:38:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 12:38:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:07,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:07,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625400326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:38:07,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:38:07,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-11-23 12:38:07,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244890212] [2021-11-23 12:38:07,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:38:07,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:38:07,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:38:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:38:07,359 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:07,589 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-23 12:38:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:38:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 12:38:07,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:07,591 INFO L225 Difference]: With dead ends: 59 [2021-11-23 12:38:07,591 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 12:38:07,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:38:07,593 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:07,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 129 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:38:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 12:38:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 12:38:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-23 12:38:07,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2021-11-23 12:38:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:07,599 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-23 12:38:07,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-23 12:38:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:38:07,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:07,606 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:07,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:07,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 12:38:07,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1036168340, now seen corresponding path program 1 times [2021-11-23 12:38:07,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:38:07,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994153045] [2021-11-23 12:38:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:07,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:38:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:08,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:38:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994153045] [2021-11-23 12:38:08,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994153045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:38:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32562692] [2021-11-23 12:38:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:08,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:38:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:38:08,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:38:08,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:38:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:08,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 12:38:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:08,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:38:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:38:08,363 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 12:38:08,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 102 [2021-11-23 12:38:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:08,430 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-11-23 12:38:08,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 76 [2021-11-23 12:38:08,455 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 12:38:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 66 treesize of output 54 [2021-11-23 12:38:08,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 12:38:08,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:38:08,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-23 12:38:08,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925847291] [2021-11-23 12:38:08,560 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 12:38:08,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:38:08,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:38:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:38:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:38:08,563 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:38:08,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:38:08,567 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:08,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:38:08,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:08,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:38:08,786 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@725713ff at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 12:38:08,789 INFO L158 Benchmark]: Toolchain (without parser) took 5243.80ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 70.9MB in the beginning and 73.7MB in the end (delta: -2.7MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2021-11-23 12:38:08,789 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory is still 68.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:38:08,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 526.02ms. Allocated memory is still 92.3MB. Free memory was 70.7MB in the beginning and 60.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 12:38:08,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.25ms. Allocated memory is still 92.3MB. Free memory was 60.3MB in the beginning and 58.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:38:08,790 INFO L158 Benchmark]: Boogie Preprocessor took 51.87ms. Allocated memory is still 92.3MB. Free memory was 58.2MB in the beginning and 56.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:38:08,790 INFO L158 Benchmark]: RCFGBuilder took 517.07ms. Allocated memory is still 92.3MB. Free memory was 56.4MB in the beginning and 40.1MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 12:38:08,791 INFO L158 Benchmark]: TraceAbstraction took 4092.53ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 39.6MB in the beginning and 73.7MB in the end (delta: -34.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:38:08,793 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory is still 68.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 526.02ms. Allocated memory is still 92.3MB. Free memory was 70.7MB in the beginning and 60.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.25ms. Allocated memory is still 92.3MB. Free memory was 60.3MB in the beginning and 58.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.87ms. Allocated memory is still 92.3MB. Free memory was 58.2MB in the beginning and 56.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 517.07ms. Allocated memory is still 92.3MB. Free memory was 56.4MB in the beginning and 40.1MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4092.53ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 39.6MB in the beginning and 73.7MB in the end (delta: -34.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@725713ff de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@725713ff: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 12:38:08,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:38:11,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:38:11,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:38:11,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:38:11,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:38:11,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:38:11,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:38:11,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:38:11,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:38:11,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:38:11,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:38:11,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:38:11,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:38:11,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:38:11,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:38:11,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:38:11,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:38:11,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:38:11,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:38:11,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:38:11,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:38:11,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:38:11,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:38:11,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:38:11,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:38:11,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:38:11,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:38:11,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:38:11,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:38:11,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:38:11,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:38:11,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:38:11,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:38:11,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:38:11,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:38:11,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:38:11,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:38:11,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:38:11,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:38:11,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:38:11,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:38:11,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-23 12:38:11,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:38:11,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:38:11,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:38:11,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:38:11,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:38:11,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:38:11,755 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:38:11,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:38:11,755 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:38:11,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:38:11,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:38:11,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:38:11,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:38:11,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:38:11,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:38:11,758 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 12:38:11,758 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 12:38:11,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:38:11,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:38:11,758 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:38:11,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:38:11,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:38:11,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:38:11,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:38:11,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:38:11,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:38:11,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:38:11,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:38:11,760 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 12:38:11,760 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 12:38:11,761 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:38:11,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:38:11,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:38:11,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:38:11,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 12:38:11,762 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 [2021-11-23 12:38:12,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:38:12,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:38:12,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:38:12,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:38:12,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:38:12,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-11-23 12:38:12,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/fd2d52a16/a2c5171bb3aa4b0ca5317be0885236ff/FLAG4d7582481 [2021-11-23 12:38:13,037 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:38:13,038 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-11-23 12:38:13,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/fd2d52a16/a2c5171bb3aa4b0ca5317be0885236ff/FLAG4d7582481 [2021-11-23 12:38:13,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/data/fd2d52a16/a2c5171bb3aa4b0ca5317be0885236ff [2021-11-23 12:38:13,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:38:13,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:38:13,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:38:13,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:38:13,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:38:13,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:13,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea394a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13, skipping insertion in model container [2021-11-23 12:38:13,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:13,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:38:13,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:38:13,731 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-11-23 12:38:13,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-11-23 12:38:13,740 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-11-23 12:38:13,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-11-23 12:38:13,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-11-23 12:38:13,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-11-23 12:38:13,764 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-11-23 12:38:13,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:38:13,783 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:38:13,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-11-23 12:38:13,847 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-11-23 12:38:13,848 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-11-23 12:38:13,852 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-11-23 12:38:13,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-11-23 12:38:13,861 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-11-23 12:38:13,863 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-11-23 12:38:13,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:38:13,916 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:38:13,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13 WrapperNode [2021-11-23 12:38:13,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:38:13,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:38:13,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:38:13,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:38:13,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:13,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,016 INFO L137 Inliner]: procedures = 122, calls = 39, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 149 [2021-11-23 12:38:14,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:38:14,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:38:14,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:38:14,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:38:14,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:38:14,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:38:14,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:38:14,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:38:14,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (1/1) ... [2021-11-23 12:38:14,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:38:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:38:14,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:38:14,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:38:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 12:38:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:38:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:38:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:38:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:38:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:38:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 12:38:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 12:38:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:38:14,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:38:14,352 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:38:14,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:38:15,412 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:38:15,419 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:38:15,419 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-23 12:38:15,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:38:15 BoogieIcfgContainer [2021-11-23 12:38:15,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:38:15,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:38:15,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:38:15,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:38:15,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:38:13" (1/3) ... [2021-11-23 12:38:15,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad1f7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:38:15, skipping insertion in model container [2021-11-23 12:38:15,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:38:13" (2/3) ... [2021-11-23 12:38:15,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad1f7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:38:15, skipping insertion in model container [2021-11-23 12:38:15,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:38:15" (3/3) ... [2021-11-23 12:38:15,432 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2021-11-23 12:38:15,438 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:38:15,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 12:38:15,490 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:38:15,498 INFO L339 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:38:15,498 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 12:38:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:38:15,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:15,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:38:15,524 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash 891569350, now seen corresponding path program 1 times [2021-11-23 12:38:15,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345613074] [2021-11-23 12:38:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:15,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:15,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:15,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:15,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 12:38:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 12:38:15,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:15,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:15,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345613074] [2021-11-23 12:38:15,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345613074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:15,738 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:15,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 12:38:15,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514472217] [2021-11-23 12:38:15,741 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:15,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:38:15,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:38:15,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:38:15,819 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:15,865 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2021-11-23 12:38:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:38:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:38:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:15,877 INFO L225 Difference]: With dead ends: 90 [2021-11-23 12:38:15,879 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:38:15,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:38:15,903 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:15,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:38:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:38:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 12:38:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-23 12:38:15,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 6 [2021-11-23 12:38:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:15,951 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-23 12:38:15,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-23 12:38:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:38:15,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:15,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:38:15,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:16,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:16,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:16,167 INFO L85 PathProgramCache]: Analyzing trace with hash 889692517, now seen corresponding path program 1 times [2021-11-23 12:38:16,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:16,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697977096] [2021-11-23 12:38:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:16,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:16,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:16,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:16,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 12:38:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:38:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:16,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:16,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697977096] [2021-11-23 12:38:16,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697977096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:16,371 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:16,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:38:16,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139839265] [2021-11-23 12:38:16,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:16,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:38:16,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:38:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:38:16,377 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:17,264 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-23 12:38:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:38:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:38:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:17,266 INFO L225 Difference]: With dead ends: 43 [2021-11-23 12:38:17,266 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 12:38:17,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:17,268 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:17,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 12:38:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 12:38:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-23 12:38:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-11-23 12:38:17,277 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 6 [2021-11-23 12:38:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:17,277 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-11-23 12:38:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-11-23 12:38:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:38:17,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:17,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:17,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:17,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:17,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1810723981, now seen corresponding path program 1 times [2021-11-23 12:38:17,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:17,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129535808] [2021-11-23 12:38:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:17,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:17,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:17,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 12:38:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:38:17,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:17,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:38:17,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 12:38:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:17,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129535808] [2021-11-23 12:38:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129535808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:17,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:17,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:38:17,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965367853] [2021-11-23 12:38:17,769 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:17,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:38:17,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:38:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:38:17,779 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:18,137 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-23 12:38:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:38:18,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:38:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:18,140 INFO L225 Difference]: With dead ends: 36 [2021-11-23 12:38:18,140 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 12:38:18,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:18,143 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:18,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 75 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:38:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 12:38:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 12:38:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-23 12:38:18,158 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 7 [2021-11-23 12:38:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-23 12:38:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-23 12:38:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 12:38:18,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:18,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:18,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:18,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:18,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 590587384, now seen corresponding path program 1 times [2021-11-23 12:38:18,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:18,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452991765] [2021-11-23 12:38:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:18,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:18,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:18,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:18,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 12:38:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:38:18,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:18,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:38:18,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 12:38:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:18,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:18,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452991765] [2021-11-23 12:38:18,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452991765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:18,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:18,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 12:38:18,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235954290] [2021-11-23 12:38:18,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:18,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:38:18,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:18,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:38:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:18,576 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:19,189 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-23 12:38:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:38:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 12:38:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:19,191 INFO L225 Difference]: With dead ends: 58 [2021-11-23 12:38:19,191 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 12:38:19,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:38:19,193 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:19,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 85 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 12:38:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 12:38:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-11-23 12:38:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-23 12:38:19,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2021-11-23 12:38:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:19,209 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-23 12:38:19,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-23 12:38:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:38:19,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:19,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:19,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 12:38:19,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:19,429 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1507179337, now seen corresponding path program 1 times [2021-11-23 12:38:19,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64097970] [2021-11-23 12:38:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:19,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:19,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:19,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:19,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 12:38:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:38:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:21,281 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-11-23 12:38:21,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 141 treesize of output 126 [2021-11-23 12:38:22,169 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-11-23 12:38:22,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 126 treesize of output 111 [2021-11-23 12:38:31,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:38:31,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 145 [2021-11-23 12:38:31,182 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-23 12:38:31,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 150 [2021-11-23 12:38:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:31,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:31,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64097970] [2021-11-23 12:38:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64097970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:31,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:31,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 12:38:31,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514396045] [2021-11-23 12:38:31,676 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:31,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:38:31,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:38:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:31,681 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:32,254 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-23 12:38:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:38:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:38:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:32,256 INFO L225 Difference]: With dead ends: 44 [2021-11-23 12:38:32,256 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 12:38:32,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:38:32,258 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:32,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 6 Unchecked, 0.6s Time] [2021-11-23 12:38:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 12:38:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-23 12:38:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 12:38:32,266 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 10 [2021-11-23 12:38:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 12:38:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 12:38:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:38:32,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:32,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:32,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:32,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:32,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2079156959, now seen corresponding path program 1 times [2021-11-23 12:38:32,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:32,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147360956] [2021-11-23 12:38:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:32,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:32,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:32,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:32,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 12:38:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:32,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:38:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:32,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:38:32,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 12:38:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:32,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:32,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147360956] [2021-11-23 12:38:32,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147360956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:38:32,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:32,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 12:38:32,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994089186] [2021-11-23 12:38:32,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:38:32,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:38:32,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:32,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:38:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:38:32,755 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:33,986 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-11-23 12:38:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:38:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:38:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:33,988 INFO L225 Difference]: With dead ends: 66 [2021-11-23 12:38:33,988 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 12:38:33,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:38:33,990 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:33,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 126 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 12:38:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 12:38:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-11-23 12:38:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-23 12:38:34,001 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 13 [2021-11-23 12:38:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:34,002 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-23 12:38:34,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-23 12:38:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:38:34,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:34,004 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:34,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 12:38:34,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:34,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash -734247455, now seen corresponding path program 1 times [2021-11-23 12:38:34,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:34,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449920597] [2021-11-23 12:38:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:34,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:34,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:34,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 12:38:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:38:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:34,338 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-23 12:38:34,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 12:38:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:34,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:34,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 12:38:34,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 12:38:34,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 12:38:34,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 12:38:34,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-23 12:38:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:34,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:38:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:38:34,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449920597] [2021-11-23 12:38:34,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449920597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:38:34,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:38:34,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-23 12:38:34,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118088922] [2021-11-23 12:38:34,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:38:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:38:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:38:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:38:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:38:34,819 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:38:36,972 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-23 12:38:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:38:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 12:38:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:38:36,973 INFO L225 Difference]: With dead ends: 55 [2021-11-23 12:38:36,973 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 12:38:36,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:38:36,975 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:38:36,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 124 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 12:38:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 12:38:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 12:38:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-23 12:38:36,981 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 16 [2021-11-23 12:38:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:38:36,982 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-23 12:38:36,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:38:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-23 12:38:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:38:36,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:38:36,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:36,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:37,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:38:37,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:38:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:38:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash -587248931, now seen corresponding path program 1 times [2021-11-23 12:38:37,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:38:37,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658158119] [2021-11-23 12:38:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:37,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:38:37,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:38:37,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:38:37,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 12:38:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 12:38:37,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:38:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:38:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:38:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:38:37,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 58 [2021-11-23 12:38:37,482 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 12:38:37,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 48 treesize of output 36 [2021-11-23 12:38:37,520 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 12:38:37,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 40 [2021-11-23 12:38:37,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:38:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658158119] [2021-11-23 12:38:37,641 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 12:38:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [9347531] [2021-11-23 12:38:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:37,641 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 12:38:37,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/cvc4 [2021-11-23 12:38:37,644 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 12:38:37,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 12:38:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 12:38:37,798 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@656e81b [2021-11-23 12:38:37,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781227756] [2021-11-23 12:38:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:38:37,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:38:37,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:38:37,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:38:37,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:38:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:38:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 12:38:37,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@656e81b [2021-11-23 12:38:37,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:38:37,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-23 12:38:37,868 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-11-23 12:38:37,868 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-23 12:38:37,875 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2021-11-23 12:38:37,878 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2021-11-23 12:38:37,878 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2021-11-23 12:38:37,878 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2021-11-23 12:38:37,878 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2021-11-23 12:38:37,878 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2021-11-23 12:38:37,879 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2021-11-23 12:38:37,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 12:38:38,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:38,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:38:38,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/cvc4 --incremental --print-success --lang smt [2021-11-23 12:38:38,483 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:38:38,485 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 12:38:38,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:38:38 BoogieIcfgContainer [2021-11-23 12:38:38,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 12:38:38,502 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:38:38,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:38:38,503 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:38:38,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:38:15" (3/4) ... [2021-11-23 12:38:38,507 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 12:38:38,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:38:38,508 INFO L158 Benchmark]: Toolchain (without parser) took 25267.47ms. Allocated memory was 65.0MB in the beginning and 113.2MB in the end (delta: 48.2MB). Free memory was 44.3MB in the beginning and 50.8MB in the end (delta: -6.6MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. [2021-11-23 12:38:38,509 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 65.0MB. Free memory is still 46.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:38:38,509 INFO L158 Benchmark]: CACSL2BoogieTranslator took 676.01ms. Allocated memory is still 65.0MB. Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.1MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-11-23 12:38:38,510 INFO L158 Benchmark]: Boogie Procedure Inliner took 99.84ms. Allocated memory is still 65.0MB. Free memory was 41.8MB in the beginning and 39.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:38:38,510 INFO L158 Benchmark]: Boogie Preprocessor took 84.57ms. Allocated memory is still 65.0MB. Free memory was 39.6MB in the beginning and 37.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:38:38,511 INFO L158 Benchmark]: RCFGBuilder took 1317.21ms. Allocated memory was 65.0MB in the beginning and 94.4MB in the end (delta: 29.4MB). Free memory was 37.6MB in the beginning and 66.5MB in the end (delta: -28.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 12:38:38,511 INFO L158 Benchmark]: TraceAbstraction took 23077.81ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 65.7MB in the beginning and 50.8MB in the end (delta: 14.8MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. [2021-11-23 12:38:38,512 INFO L158 Benchmark]: Witness Printer took 5.28ms. Allocated memory is still 113.2MB. Free memory is still 50.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:38:38,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 65.0MB. Free memory is still 46.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 676.01ms. Allocated memory is still 65.0MB. Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.1MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 99.84ms. Allocated memory is still 65.0MB. Free memory was 41.8MB in the beginning and 39.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 84.57ms. Allocated memory is still 65.0MB. Free memory was 39.6MB in the beginning and 37.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1317.21ms. Allocated memory was 65.0MB in the beginning and 94.4MB in the end (delta: 29.4MB). Free memory was 37.6MB in the beginning and 66.5MB in the end (delta: -28.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 23077.81ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 65.7MB in the beginning and 50.8MB in the end (delta: 14.8MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. * Witness Printer took 5.28ms. Allocated memory is still 113.2MB. Free memory is still 50.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1044]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1005] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1006] list->next = ((void*)0) [L1007] list->prev = ((void*)0) [L1008] list->colour = BLACK [L1010] struct TSLL* end = list; [L1013] COND TRUE __VERIFIER_nondet_int() [L1016] end->next = malloc(sizeof(struct TSLL)) [L1017] EXPR end->next [L1017] end->next->prev = end [L1018] EXPR end->next [L1018] end = end->next [L1019] end->next = ((void*)0) [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1027] end->colour = RED [L1028] end->next = malloc(sizeof(struct TSLL)) [L1029] EXPR end->next [L1029] end->next->prev = end [L1030] EXPR end->next [L1030] end = end->next [L1031] end->next = ((void*)0) [L1032] end->colour = BLACK [L1034] EXPR end->colour [L1034] COND FALSE !(!(BLACK == end->colour)) [L1035] EXPR end->next [L1035] COND FALSE !(!(((void*)0) == end->next)) [L1036] COND FALSE !(!(((void*)0) != end)) [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1039] end = ((void*)0) [L1040] end = list [L1043] COND FALSE !(!(((void*)0) != end)) [L1044] EXPR end->colour [L1044] COND TRUE !(BLACK == end->colour) [L1044] reach_error() - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1050]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 23.0s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 163 SdHoareTripleChecker+Valid, 5.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 163 mSDsluCounter, 573 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 6 IncrementalHoareTripleChecker+Unchecked, 361 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 245 IncrementalHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 212 mSDtfsCounter, 245 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 36 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 120 ConstructedInterpolants, 4 QuantifiedInterpolants, 1371 SizeOfPredicates, 26 NumberOfNonLiveVariables, 380 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 12:38:38,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a84a82-2cb8-4f70-b7d7-2808b98295f1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN