./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_password_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_password_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 3cb77685c99da394e56759788276300560cc521e5b9b98850714a1baff20c383 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 09:44:58,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 09:44:58,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 09:44:58,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 09:44:58,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 09:44:58,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 09:44:58,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 09:44:58,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 09:44:58,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 09:44:58,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 09:44:58,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 09:44:58,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 09:44:58,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 09:44:58,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 09:44:58,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 09:44:58,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 09:44:58,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 09:44:58,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 09:44:58,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 09:44:58,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 09:44:58,992 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 09:44:58,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 09:44:58,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 09:44:58,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 09:44:58,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 09:44:59,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 09:44:59,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 09:44:59,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 09:44:59,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 09:44:59,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 09:44:59,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 09:44:59,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 09:44:59,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 09:44:59,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 09:44:59,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 09:44:59,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 09:44:59,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 09:44:59,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 09:44:59,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 09:44:59,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 09:44:59,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 09:44:59,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 09:44:59,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 09:44:59,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 09:44:59,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 09:44:59,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 09:44:59,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 09:44:59,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 09:44:59,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 09:44:59,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 09:44:59,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 09:44:59,037 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 09:44:59,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 09:44:59,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 09:44:59,038 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 09:44:59,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 09:44:59,039 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 09:44:59,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 09:44:59,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 09:44:59,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 09:44:59,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 09:44:59,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:44:59,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 09:44:59,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 09:44:59,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 09:44:59,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 09:44:59,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 09:44:59,041 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 09:44:59,041 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 09:44:59,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 09:44:59,041 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cb77685c99da394e56759788276300560cc521e5b9b98850714a1baff20c383 [2022-07-13 09:44:59,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 09:44:59,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 09:44:59,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 09:44:59,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 09:44:59,265 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 09:44:59,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_password_ground.i [2022-07-13 09:44:59,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910655c01/19a533b8d83b4f0f9ce84f23ca382aeb/FLAGe4e3c03f8 [2022-07-13 09:44:59,622 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 09:44:59,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_password_ground.i [2022-07-13 09:44:59,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910655c01/19a533b8d83b4f0f9ce84f23ca382aeb/FLAGe4e3c03f8 [2022-07-13 09:45:00,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910655c01/19a533b8d83b4f0f9ce84f23ca382aeb [2022-07-13 09:45:00,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 09:45:00,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 09:45:00,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 09:45:00,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 09:45:00,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 09:45:00,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385242d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00, skipping insertion in model container [2022-07-13 09:45:00,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 09:45:00,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 09:45:00,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_password_ground.i[817,830] [2022-07-13 09:45:00,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:45:00,213 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 09:45:00,222 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_password_ground.i[817,830] [2022-07-13 09:45:00,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:45:00,243 INFO L208 MainTranslator]: Completed translation [2022-07-13 09:45:00,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00 WrapperNode [2022-07-13 09:45:00,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 09:45:00,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 09:45:00,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 09:45:00,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 09:45:00,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,269 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2022-07-13 09:45:00,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 09:45:00,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 09:45:00,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 09:45:00,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 09:45:00,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 09:45:00,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 09:45:00,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 09:45:00,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 09:45:00,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (1/1) ... [2022-07-13 09:45:00,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:45:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:00,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 09:45:00,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 09:45:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 09:45:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 09:45:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 09:45:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 09:45:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 09:45:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 09:45:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 09:45:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 09:45:00,391 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 09:45:00,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 09:45:00,480 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 09:45:00,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 09:45:00,485 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 09:45:00,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:45:00 BoogieIcfgContainer [2022-07-13 09:45:00,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 09:45:00,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 09:45:00,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 09:45:00,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 09:45:00,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:45:00" (1/3) ... [2022-07-13 09:45:00,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9c8ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:45:00, skipping insertion in model container [2022-07-13 09:45:00,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:45:00" (2/3) ... [2022-07-13 09:45:00,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9c8ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:45:00, skipping insertion in model container [2022-07-13 09:45:00,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:45:00" (3/3) ... [2022-07-13 09:45:00,492 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2022-07-13 09:45:00,501 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 09:45:00,501 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 09:45:00,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 09:45:00,535 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7da7b6e7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e76e421 [2022-07-13 09:45:00,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 09:45:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) [2022-07-13 09:45:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 09:45:00,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:00,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:00,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2006075616, now seen corresponding path program 1 times [2022-07-13 09:45:00,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:00,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142024765] [2022-07-13 09:45:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:00,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:45:00,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:00,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142024765] [2022-07-13 09:45:00,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142024765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:45:00,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:45:00,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 09:45:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843672984] [2022-07-13 09:45:00,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:45:00,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:45:00,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:45:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:45:00,718 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-07-13 09:45:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:00,744 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2022-07-13 09:45:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:45:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-07-13 09:45:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:00,751 INFO L225 Difference]: With dead ends: 39 [2022-07-13 09:45:00,751 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 09:45:00,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:45:00,755 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:00,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:45:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 09:45:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-07-13 09:45:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-07-13 09:45:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-13 09:45:00,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-07-13 09:45:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:00,777 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-13 09:45:00,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-07-13 09:45:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-13 09:45:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 09:45:00,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:00,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 09:45:00,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -324076335, now seen corresponding path program 1 times [2022-07-13 09:45:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323023852] [2022-07-13 09:45:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:00,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:45:00,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323023852] [2022-07-13 09:45:00,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323023852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754495187] [2022-07-13 09:45:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:00,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:00,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 09:45:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 09:45:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:45:00,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:45:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754495187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:45:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:45:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 09:45:00,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416741752] [2022-07-13 09:45:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:45:00,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:45:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:45:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:45:00,893 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-07-13 09:45:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:00,899 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-13 09:45:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:45:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2022-07-13 09:45:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:00,901 INFO L225 Difference]: With dead ends: 27 [2022-07-13 09:45:00,901 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 09:45:00,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:45:00,902 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:00,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:45:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 09:45:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-13 09:45:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-07-13 09:45:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-13 09:45:00,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-07-13 09:45:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:00,906 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-13 09:45:00,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-07-13 09:45:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-13 09:45:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 09:45:00,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:00,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:00,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:01,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:01,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1450931027, now seen corresponding path program 1 times [2022-07-13 09:45:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:01,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794615105] [2022-07-13 09:45:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:45:01,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:01,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794615105] [2022-07-13 09:45:01,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794615105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181877079] [2022-07-13 09:45:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:01,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:01,204 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 09:45:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 09:45:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:45:01,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:45:01,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181877079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:01,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:01,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 09:45:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357383520] [2022-07-13 09:45:01,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:01,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 09:45:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 09:45:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:45:01,311 INFO L87 Difference]: Start difference. First operand 17 states and 19 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) [2022-07-13 09:45:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:01,350 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-07-13 09:45:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:45:01,350 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 14 [2022-07-13 09:45:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:01,351 INFO L225 Difference]: With dead ends: 44 [2022-07-13 09:45:01,351 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 09:45:01,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:45:01,352 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:01,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:45:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 09:45:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-13 09:45:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2022-07-13 09:45:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-07-13 09:45:01,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 14 [2022-07-13 09:45:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:01,357 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-07-13 09:45:01,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-13 09:45:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-07-13 09:45:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 09:45:01,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:01,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:01,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 09:45:01,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash 443135373, now seen corresponding path program 2 times [2022-07-13 09:45:01,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:01,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200032744] [2022-07-13 09:45:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:01,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:45:01,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200032744] [2022-07-13 09:45:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200032744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980372486] [2022-07-13 09:45:01,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:45:01,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:01,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 09:45:01,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:45:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:45:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 09:45:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:45:01,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:45:01,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980372486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:01,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:01,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-13 09:45:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040855253] [2022-07-13 09:45:01,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:01,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 09:45:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 09:45:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:45:01,871 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-07-13 09:45:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:01,947 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-07-13 09:45:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 09:45:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 29 [2022-07-13 09:45:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:01,948 INFO L225 Difference]: With dead ends: 83 [2022-07-13 09:45:01,949 INFO L226 Difference]: Without dead ends: 62 [2022-07-13 09:45:01,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:45:01,950 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:01,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:45:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-13 09:45:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-13 09:45:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 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) [2022-07-13 09:45:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-07-13 09:45:01,978 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 29 [2022-07-13 09:45:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:01,978 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-07-13 09:45:01,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-07-13 09:45:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-07-13 09:45:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 09:45:01,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:01,979 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:01,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:02,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:02,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1764901633, now seen corresponding path program 3 times [2022-07-13 09:45:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:02,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52869547] [2022-07-13 09:45:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:02,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 09:45:02,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52869547] [2022-07-13 09:45:02,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52869547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490301000] [2022-07-13 09:45:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:45:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:02,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:02,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 09:45:02,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 09:45:02,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:45:02,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 09:45:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-13 09:45:02,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:02,958 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-13 09:45:02,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-13 09:45:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-13 09:45:02,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490301000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:02,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:02,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 22 [2022-07-13 09:45:02,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475492632] [2022-07-13 09:45:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:02,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 09:45:02,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 09:45:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-13 09:45:02,998 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) [2022-07-13 09:45:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:03,399 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-07-13 09:45:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 09:45:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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 59 [2022-07-13 09:45:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:03,400 INFO L225 Difference]: With dead ends: 114 [2022-07-13 09:45:03,401 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 09:45:03,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 09:45:03,402 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:03,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 76 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:45:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 09:45:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-07-13 09:45:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2022-07-13 09:45:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-13 09:45:03,410 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2022-07-13 09:45:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:03,410 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-13 09:45:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) [2022-07-13 09:45:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-13 09:45:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 09:45:03,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:03,412 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:03,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:03,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:03,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash -294095331, now seen corresponding path program 1 times [2022-07-13 09:45:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762716968] [2022-07-13 09:45:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-13 09:45:03,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:03,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762716968] [2022-07-13 09:45:03,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762716968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:03,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346985460] [2022-07-13 09:45:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:03,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:03,785 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 09:45:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 09:45:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-13 09:45:03,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-13 09:45:04,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346985460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:04,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:04,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-13 09:45:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845835600] [2022-07-13 09:45:04,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:04,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 09:45:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 09:45:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-13 09:45:04,083 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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) [2022-07-13 09:45:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:04,228 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2022-07-13 09:45:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 09:45:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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 68 [2022-07-13 09:45:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:04,230 INFO L225 Difference]: With dead ends: 178 [2022-07-13 09:45:04,230 INFO L226 Difference]: Without dead ends: 134 [2022-07-13 09:45:04,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-13 09:45:04,231 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:04,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 45 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:45:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-13 09:45:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-13 09:45:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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) [2022-07-13 09:45:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-07-13 09:45:04,240 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 68 [2022-07-13 09:45:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:04,240 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-07-13 09:45:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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) [2022-07-13 09:45:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-07-13 09:45:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-13 09:45:04,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:04,241 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:04,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:04,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:04,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1900697445, now seen corresponding path program 2 times [2022-07-13 09:45:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:04,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906572303] [2022-07-13 09:45:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-07-13 09:45:04,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906572303] [2022-07-13 09:45:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906572303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813322799] [2022-07-13 09:45:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:45:04,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:04,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:04,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 09:45:04,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:45:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:45:04,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 09:45:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-07-13 09:45:05,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-07-13 09:45:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813322799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:05,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:05,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-13 09:45:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85002747] [2022-07-13 09:45:05,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 09:45:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 09:45:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 09:45:05,667 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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) [2022-07-13 09:45:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:05,980 INFO L93 Difference]: Finished difference Result 347 states and 402 transitions. [2022-07-13 09:45:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 09:45:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 133 [2022-07-13 09:45:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:05,984 INFO L225 Difference]: With dead ends: 347 [2022-07-13 09:45:05,984 INFO L226 Difference]: Without dead ends: 264 [2022-07-13 09:45:05,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 09:45:05,986 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 390 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:05,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 94 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 09:45:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-13 09:45:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-13 09:45:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 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) [2022-07-13 09:45:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2022-07-13 09:45:06,013 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 133 [2022-07-13 09:45:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:06,013 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2022-07-13 09:45:06,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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) [2022-07-13 09:45:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2022-07-13 09:45:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-13 09:45:06,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:06,015 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:06,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:06,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:06,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 871306471, now seen corresponding path program 3 times [2022-07-13 09:45:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:06,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406068969] [2022-07-13 09:45:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3727 trivial. 0 not checked. [2022-07-13 09:45:07,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:07,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406068969] [2022-07-13 09:45:07,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406068969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:07,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839907121] [2022-07-13 09:45:07,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:45:07,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:07,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:07,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 09:45:07,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 09:45:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:45:07,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 09:45:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 5881 trivial. 0 not checked. [2022-07-13 09:45:08,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:08,764 INFO L356 Elim1Store]: treesize reduction 50, result has 48.5 percent of original size [2022-07-13 09:45:08,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 54 [2022-07-13 09:45:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 48 proven. 199 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2022-07-13 09:45:08,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839907121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:08,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:08,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 10, 9] total 66 [2022-07-13 09:45:08,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767546214] [2022-07-13 09:45:08,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:08,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 09:45:08,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 09:45:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1574, Invalid=2716, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 09:45:08,803 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 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) [2022-07-13 09:45:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:11,816 INFO L93 Difference]: Finished difference Result 440 states and 446 transitions. [2022-07-13 09:45:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-13 09:45:11,817 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 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 263 [2022-07-13 09:45:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:11,819 INFO L225 Difference]: With dead ends: 440 [2022-07-13 09:45:11,819 INFO L226 Difference]: Without dead ends: 279 [2022-07-13 09:45:11,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 511 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6378 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8419, Invalid=19637, Unknown=0, NotChecked=0, Total=28056 [2022-07-13 09:45:11,826 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 689 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:11,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 130 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 09:45:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-13 09:45:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2022-07-13 09:45:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 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) [2022-07-13 09:45:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-07-13 09:45:11,835 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2022-07-13 09:45:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:11,835 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-07-13 09:45:11,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 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) [2022-07-13 09:45:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-07-13 09:45:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-13 09:45:11,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:11,838 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 51, 51, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:11,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:12,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:12,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -395551069, now seen corresponding path program 4 times [2022-07-13 09:45:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:12,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958140482] [2022-07-13 09:45:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3884 trivial. 0 not checked. [2022-07-13 09:45:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958140482] [2022-07-13 09:45:13,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958140482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224455948] [2022-07-13 09:45:13,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:45:13,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:13,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:13,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:13,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 09:45:13,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:45:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:45:13,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 09:45:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2022-07-13 09:45:13,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2022-07-13 09:45:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224455948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:15,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:15,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-13 09:45:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832750130] [2022-07-13 09:45:15,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:15,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-13 09:45:15,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-13 09:45:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-13 09:45:15,932 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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) [2022-07-13 09:45:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:16,852 INFO L93 Difference]: Finished difference Result 706 states and 815 transitions. [2022-07-13 09:45:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-13 09:45:16,853 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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 272 [2022-07-13 09:45:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:16,855 INFO L225 Difference]: With dead ends: 706 [2022-07-13 09:45:16,855 INFO L226 Difference]: Without dead ends: 538 [2022-07-13 09:45:16,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-13 09:45:16,857 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 629 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:16,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 140 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 09:45:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-07-13 09:45:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-07-13 09:45:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.005586592178771) internal successors, (540), 537 states have internal predecessors, (540), 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) [2022-07-13 09:45:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 540 transitions. [2022-07-13 09:45:16,870 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 540 transitions. Word has length 272 [2022-07-13 09:45:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:16,870 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 540 transitions. [2022-07-13 09:45:16,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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) [2022-07-13 09:45:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 540 transitions. [2022-07-13 09:45:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-07-13 09:45:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:16,875 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 104, 104, 104, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:16,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 09:45:17,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 09:45:17,092 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 129474353, now seen corresponding path program 5 times [2022-07-13 09:45:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772034260] [2022-07-13 09:45:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26996 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 16180 trivial. 0 not checked. [2022-07-13 09:45:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772034260] [2022-07-13 09:45:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772034260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688806149] [2022-07-13 09:45:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:45:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:20,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:45:20,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process