./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/min-3-n-u.c --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-multidimensional/min-3-n-u.c -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 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:41:07,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:41:07,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:41:07,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:41:07,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:41:07,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:41:07,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:41:07,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:41:07,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:41:07,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:41:07,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:41:07,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:41:07,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:41:07,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:41:07,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:41:07,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:41:07,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:41:07,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:41:07,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:41:07,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:41:07,184 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:41:07,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:41:07,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:41:07,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:41:07,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:41:07,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:41:07,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:41:07,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:41:07,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:41:07,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:41:07,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:41:07,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:41:07,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:41:07,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:41:07,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:41:07,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:41:07,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:41:07,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:41:07,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:41:07,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:41:07,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:41:07,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:41:07,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:41:07,240 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:41:07,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:41:07,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:41:07,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:41:07,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:41:07,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:41:07,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:41:07,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:41:07,243 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:41:07,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:41:07,244 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:41:07,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:41:07,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:41:07,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:41:07,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:41:07,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:41:07,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:41:07,245 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:41:07,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:41:07,246 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:41:07,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:41:07,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:41:07,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:41:07,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:41:07,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:41:07,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:41:07,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:41:07,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:41:07,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:41:07,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:41:07,249 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:41:07,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:41:07,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:41:07,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2022-07-13 10:41:07,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:41:07,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:41:07,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:41:07,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:41:07,510 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:41:07,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-13 10:41:07,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab984c02b/9e81df901649408d9b519925acfb29e6/FLAG6b833f76f [2022-07-13 10:41:07,979 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:41:07,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-13 10:41:07,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab984c02b/9e81df901649408d9b519925acfb29e6/FLAG6b833f76f [2022-07-13 10:41:07,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab984c02b/9e81df901649408d9b519925acfb29e6 [2022-07-13 10:41:07,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:41:07,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:41:08,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:41:08,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:41:08,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:41:08,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:41:07" (1/1) ... [2022-07-13 10:41:08,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a689f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08, skipping insertion in model container [2022-07-13 10:41:08,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:41:07" (1/1) ... [2022-07-13 10:41:08,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:41:08,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:41:08,159 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-multidimensional/min-3-n-u.c[321,334] [2022-07-13 10:41:08,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:41:08,181 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:41:08,191 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-multidimensional/min-3-n-u.c[321,334] [2022-07-13 10:41:08,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:41:08,209 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:41:08,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08 WrapperNode [2022-07-13 10:41:08,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:41:08,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:41:08,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:41:08,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:41:08,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,252 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-07-13 10:41:08,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:41:08,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:41:08,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:41:08,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:41:08,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:41:08,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:41:08,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:41:08,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:41:08,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (1/1) ... [2022-07-13 10:41:08,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:41:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:08,322 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 10:41:08,324 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 10:41:08,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:41:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:41:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:41:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:41:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:41:08,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:41:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:41:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:41:08,412 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:41:08,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:41:08,606 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:41:08,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:41:08,611 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-13 10:41:08,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:41:08 BoogieIcfgContainer [2022-07-13 10:41:08,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:41:08,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:41:08,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:41:08,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:41:08,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:41:07" (1/3) ... [2022-07-13 10:41:08,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7c8c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:41:08, skipping insertion in model container [2022-07-13 10:41:08,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:41:08" (2/3) ... [2022-07-13 10:41:08,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7c8c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:41:08, skipping insertion in model container [2022-07-13 10:41:08,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:41:08" (3/3) ... [2022-07-13 10:41:08,620 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2022-07-13 10:41:08,647 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:41:08,647 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:41:08,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:41:08,711 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@3265e123, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ae43ca8 [2022-07-13 10:41:08,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:41:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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 10:41:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:41:08,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:08,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:08,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-07-13 10:41:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:08,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366523756] [2022-07-13 10:41:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:08,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:08,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538487180] [2022-07-13 10:41:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:08,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:08,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:08,839 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 10:41:08,852 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 10:41:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:41:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 10:41:08,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:08,956 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 10:41:08,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:41:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366523756] [2022-07-13 10:41:08,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:08,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538487180] [2022-07-13 10:41:08,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538487180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:41:08,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:41:08,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:41:08,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525894438] [2022-07-13 10:41:08,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:41:08,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:41:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:41:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:41:08,996 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:09,014 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-07-13 10:41:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:41:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 10:41:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:09,022 INFO L225 Difference]: With dead ends: 56 [2022-07-13 10:41:09,022 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:41:09,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:41:09,032 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:09,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:41:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:41:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-13 10:41:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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 10:41:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-07-13 10:41:09,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-07-13 10:41:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:09,067 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-13 10:41:09,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-07-13 10:41:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:41:09,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:09,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:09,095 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 10:41:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 10:41:09,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-07-13 10:41:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:09,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700541654] [2022-07-13 10:41:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:09,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371750829] [2022-07-13 10:41:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:09,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:09,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:09,306 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 10:41:09,309 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 10:41:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:41:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:41:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:09,403 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 10:41:09,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:41:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:09,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700541654] [2022-07-13 10:41:09,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371750829] [2022-07-13 10:41:09,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371750829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:41:09,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:41:09,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:41:09,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050155463] [2022-07-13 10:41:09,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:41:09,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:41:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:41:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:41:09,413 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:09,464 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-07-13 10:41:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:41:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 10:41:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:09,469 INFO L225 Difference]: With dead ends: 48 [2022-07-13 10:41:09,469 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 10:41:09,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 10:41:09,472 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:09,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:41:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 10:41:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-13 10:41:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 10:41:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-13 10:41:09,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-07-13 10:41:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:09,487 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-13 10:41:09,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:09,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-13 10:41:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 10:41:09,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:09,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:09,512 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 10:41:09,708 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,SelfDestructingSolverStorable1 [2022-07-13 10:41:09,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-07-13 10:41:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625978490] [2022-07-13 10:41:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:09,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:09,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056327775] [2022-07-13 10:41:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:09,727 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 10:41:09,739 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 10:41:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:41:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:41:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:41:09,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:41:09,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:09,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625978490] [2022-07-13 10:41:09,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:09,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056327775] [2022-07-13 10:41:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056327775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:41:09,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:41:09,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:41:09,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855075664] [2022-07-13 10:41:09,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:41:09,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:41:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:41:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:41:09,821 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 10:41:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:09,890 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-07-13 10:41:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:41:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10:41:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:09,892 INFO L225 Difference]: With dead ends: 67 [2022-07-13 10:41:09,892 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 10:41:09,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:41:09,894 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:09,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:41:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 10:41:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-07-13 10:41:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-13 10:41:09,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-13 10:41:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:09,908 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-13 10:41:09,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10:41:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-13 10:41:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 10:41:09,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:09,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:09,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 10:41:10,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:10,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-07-13 10:41:10,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:10,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389896685] [2022-07-13 10:41:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:10,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:10,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930346586] [2022-07-13 10:41:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:10,145 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 10:41:10,151 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 10:41:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:41:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:41:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:41:10,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:41:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389896685] [2022-07-13 10:41:10,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930346586] [2022-07-13 10:41:10,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930346586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:41:10,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:41:10,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:41:10,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172436696] [2022-07-13 10:41:10,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:41:10,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:41:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:41:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:41:10,216 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:41:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:10,255 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-07-13 10:41:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:41:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 10:41:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:10,257 INFO L225 Difference]: With dead ends: 67 [2022-07-13 10:41:10,257 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 10:41:10,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:41:10,258 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:10,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:41:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 10:41:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-07-13 10:41:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 10:41:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-13 10:41:10,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-13 10:41:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:10,265 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-13 10:41:10,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:41:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-13 10:41:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 10:41:10,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:10,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:10,294 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 10:41:10,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:10,491 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-07-13 10:41:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518642119] [2022-07-13 10:41:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:10,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:10,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997578909] [2022-07-13 10:41:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:10,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:10,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:10,502 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 10:41:10,506 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 10:41:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:41:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:41:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:41:10,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:41:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:41:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518642119] [2022-07-13 10:41:10,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997578909] [2022-07-13 10:41:10,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997578909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:41:10,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:41:10,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 10:41:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374880667] [2022-07-13 10:41:10,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:41:10,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:41:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:41:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:41:10,622 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:10,723 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-07-13 10:41:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:41:10,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 10:41:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:10,724 INFO L225 Difference]: With dead ends: 91 [2022-07-13 10:41:10,724 INFO L226 Difference]: Without dead ends: 62 [2022-07-13 10:41:10,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:41:10,726 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:10,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:41:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-13 10:41:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-07-13 10:41:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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 10:41:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-07-13 10:41:10,735 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2022-07-13 10:41:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:10,735 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-07-13 10:41:10,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-07-13 10:41:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 10:41:10,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:10,736 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:10,752 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 10:41:10,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:10,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2022-07-13 10:41:10,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705308757] [2022-07-13 10:41:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:10,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:10,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139726544] [2022-07-13 10:41:10,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:41:10,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:10,952 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 10:41:10,970 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 10:41:11,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 10:41:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:41:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:41:11,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:41:11,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:41:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705308757] [2022-07-13 10:41:11,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:11,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139726544] [2022-07-13 10:41:11,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139726544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:41:11,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:41:11,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:41:11,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397791337] [2022-07-13 10:41:11,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:41:11,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:41:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:41:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:41:11,089 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 10:41:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:11,171 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-13 10:41:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:41:11,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2022-07-13 10:41:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:11,173 INFO L225 Difference]: With dead ends: 121 [2022-07-13 10:41:11,173 INFO L226 Difference]: Without dead ends: 100 [2022-07-13 10:41:11,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:41:11,174 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:11,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:41:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-13 10:41:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-07-13 10:41:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 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 10:41:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-13 10:41:11,185 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2022-07-13 10:41:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-13 10:41:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 10:41:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-13 10:41:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:41:11,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:11,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:11,211 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 10:41:11,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:11,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2022-07-13 10:41:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922097794] [2022-07-13 10:41:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:11,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:11,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993381147] [2022-07-13 10:41:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:11,430 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 10:41:11,431 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 10:41:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:41:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:41:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:41:11,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:41:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:41:11,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922097794] [2022-07-13 10:41:11,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993381147] [2022-07-13 10:41:11,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993381147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:41:11,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:41:11,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-13 10:41:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690327672] [2022-07-13 10:41:11,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:41:11,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:41:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:41:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:41:11,638 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:11,879 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2022-07-13 10:41:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:41:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-13 10:41:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:11,880 INFO L225 Difference]: With dead ends: 166 [2022-07-13 10:41:11,880 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 10:41:11,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:41:11,881 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:11,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:41:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 10:41:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2022-07-13 10:41:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 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 10:41:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-13 10:41:11,915 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2022-07-13 10:41:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:11,915 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-13 10:41:11,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:41:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-13 10:41:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:41:11,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:11,921 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:11,948 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 10:41:12,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:12,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2022-07-13 10:41:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163984860] [2022-07-13 10:41:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:12,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:12,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653600002] [2022-07-13 10:41:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:41:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:12,162 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 10:41:12,179 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 10:41:12,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:41:12,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:41:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 10:41:12,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 10:41:12,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:41:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 10:41:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163984860] [2022-07-13 10:41:12,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653600002] [2022-07-13 10:41:12,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653600002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:41:12,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:41:12,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-13 10:41:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767254501] [2022-07-13 10:41:12,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:41:12,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:41:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:41:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:41:12,611 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 10:41:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:13,144 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2022-07-13 10:41:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:41:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 63 [2022-07-13 10:41:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:13,146 INFO L225 Difference]: With dead ends: 316 [2022-07-13 10:41:13,146 INFO L226 Difference]: Without dead ends: 223 [2022-07-13 10:41:13,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 10:41:13,148 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:13,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:41:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-13 10:41:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2022-07-13 10:41:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 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 10:41:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2022-07-13 10:41:13,166 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2022-07-13 10:41:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:13,167 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2022-07-13 10:41:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 10:41:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2022-07-13 10:41:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 10:41:13,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:13,168 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:13,198 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 10:41:13,382 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,SelfDestructingSolverStorable7 [2022-07-13 10:41:13,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:13,383 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2022-07-13 10:41:13,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:13,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825585754] [2022-07-13 10:41:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:13,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:13,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111976325] [2022-07-13 10:41:13,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:41:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:13,404 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 10:41:13,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:41:13,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 10:41:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:41:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:41:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:41:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-13 10:41:13,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:41:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-13 10:41:13,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:41:13,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825585754] [2022-07-13 10:41:13,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:41:13,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111976325] [2022-07-13 10:41:13,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111976325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:41:13,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:41:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 10:41:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822363027] [2022-07-13 10:41:13,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:41:13,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:41:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:41:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:41:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:41:13,910 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 10:41:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:41:14,037 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2022-07-13 10:41:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:41:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2022-07-13 10:41:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:41:14,042 INFO L225 Difference]: With dead ends: 852 [2022-07-13 10:41:14,042 INFO L226 Difference]: Without dead ends: 703 [2022-07-13 10:41:14,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:41:14,046 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:41:14,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:41:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-13 10:41:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2022-07-13 10:41:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 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 10:41:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2022-07-13 10:41:14,104 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2022-07-13 10:41:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:41:14,105 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2022-07-13 10:41:14,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 10:41:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2022-07-13 10:41:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-13 10:41:14,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:41:14,109 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:41:14,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:41:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:14,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:41:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:41:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2022-07-13 10:41:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:41:14,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748712474] [2022-07-13 10:41:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:41:14,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:41:14,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:41:14,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045594481] [2022-07-13 10:41:14,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:41:14,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:41:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:41:14,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:41:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:41:14,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:41:14,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:41:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2022-07-13 10:41:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:16,665 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-07-13 10:43:16,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-07-13 10:43:16,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:43:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748712474] [2022-07-13 10:43:16,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:43:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045594481] [2022-07-13 10:43:16,666 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 10:43:16,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:43:16,867 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:929) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 44 more [2022-07-13 10:43:16,870 INFO L158 Benchmark]: Toolchain (without parser) took 128872.63ms. Allocated memory was 100.7MB in the beginning and 148.9MB in the end (delta: 48.2MB). Free memory was 67.6MB in the beginning and 107.0MB in the end (delta: -39.5MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2022-07-13 10:43:16,870 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 77.6MB. Free memory was 36.9MB in the beginning and 36.8MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 10:43:16,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.06ms. Allocated memory is still 100.7MB. Free memory was 67.4MB in the beginning and 75.6MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 10:43:16,871 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.86ms. Allocated memory is still 100.7MB. Free memory was 75.1MB in the beginning and 73.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 10:43:16,871 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 72.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 10:43:16,871 INFO L158 Benchmark]: RCFGBuilder took 318.87ms. Allocated memory is still 100.7MB. Free memory was 72.5MB in the beginning and 61.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 10:43:16,871 INFO L158 Benchmark]: TraceAbstraction took 128254.93ms. Allocated memory was 100.7MB in the beginning and 148.9MB in the end (delta: 48.2MB). Free memory was 60.4MB in the beginning and 107.0MB in the end (delta: -46.6MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2022-07-13 10:43:16,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 77.6MB. Free memory was 36.9MB in the beginning and 36.8MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.06ms. Allocated memory is still 100.7MB. Free memory was 67.4MB in the beginning and 75.6MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.86ms. Allocated memory is still 100.7MB. Free memory was 75.1MB in the beginning and 73.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.26ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 72.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 318.87ms. Allocated memory is still 100.7MB. Free memory was 72.5MB in the beginning and 61.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 128254.93ms. Allocated memory was 100.7MB in the beginning and 148.9MB in the end (delta: 48.2MB). Free memory was 60.4MB in the beginning and 107.0MB in the end (delta: -46.6MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/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-multidimensional/min-3-n-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:43:18,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:43:18,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:43:18,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:43:18,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:43:18,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:43:18,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:43:18,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:43:18,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:43:18,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:43:18,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:43:18,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:43:18,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:43:18,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:43:18,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:43:18,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:43:18,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:43:18,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:43:18,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:43:18,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:43:18,545 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:43:18,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:43:18,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:43:18,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:43:18,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:43:18,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:43:18,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:43:18,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:43:18,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:43:18,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:43:18,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:43:18,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:43:18,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:43:18,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:43:18,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:43:18,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:43:18,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:43:18,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:43:18,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:43:18,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:43:18,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:43:18,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:43:18,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 10:43:18,593 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:43:18,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:43:18,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:43:18,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:43:18,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:43:18,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:43:18,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:43:18,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:43:18,596 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:43:18,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:43:18,597 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:43:18,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:43:18,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:43:18,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:43:18,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:43:18,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:43:18,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 10:43:18,604 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 10:43:18,605 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 10:43:18,605 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:43:18,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:43:18,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:43:18,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:43:18,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:43:18,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:43:18,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:43:18,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:43:18,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:43:18,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:43:18,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:43:18,609 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 10:43:18,610 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 10:43:18,610 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:43:18,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:43:18,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:43:18,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 10:43:18,611 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2022-07-13 10:43:18,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:43:18,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:43:18,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:43:18,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:43:18,966 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:43:18,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-13 10:43:19,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fd654ae/d5027f2be163475f931b3edb586a1075/FLAG8860049b2 [2022-07-13 10:43:19,445 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:43:19,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-13 10:43:19,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fd654ae/d5027f2be163475f931b3edb586a1075/FLAG8860049b2 [2022-07-13 10:43:19,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fd654ae/d5027f2be163475f931b3edb586a1075 [2022-07-13 10:43:19,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:43:19,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:43:19,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:43:19,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:43:19,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:43:19,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:43:19" (1/1) ... [2022-07-13 10:43:19,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef994b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:19, skipping insertion in model container [2022-07-13 10:43:19,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:43:19" (1/1) ... [2022-07-13 10:43:19,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:43:19,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:43:19,982 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-multidimensional/min-3-n-u.c[321,334] [2022-07-13 10:43:19,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:43:20,006 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:43:20,021 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-multidimensional/min-3-n-u.c[321,334] [2022-07-13 10:43:20,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:43:20,059 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:43:20,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20 WrapperNode [2022-07-13 10:43:20,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:43:20,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:43:20,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:43:20,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:43:20,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,106 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-07-13 10:43:20,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:43:20,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:43:20,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:43:20,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:43:20,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:43:20,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:43:20,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:43:20,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:43:20,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (1/1) ... [2022-07-13 10:43:20,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:43:20,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:43:20,196 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 10:43:20,209 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 10:43:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:43:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 10:43:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:43:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 10:43:20,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:43:20,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:43:20,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:43:20,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 10:43:20,312 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:43:20,314 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:43:20,760 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:43:20,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:43:20,765 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-13 10:43:20,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:43:20 BoogieIcfgContainer [2022-07-13 10:43:20,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:43:20,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:43:20,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:43:20,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:43:20,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:43:19" (1/3) ... [2022-07-13 10:43:20,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0128e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:43:20, skipping insertion in model container [2022-07-13 10:43:20,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:43:20" (2/3) ... [2022-07-13 10:43:20,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0128e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:43:20, skipping insertion in model container [2022-07-13 10:43:20,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:43:20" (3/3) ... [2022-07-13 10:43:20,773 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2022-07-13 10:43:20,785 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:43:20,785 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:43:20,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:43:20,825 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@8270187, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7aee4850 [2022-07-13 10:43:20,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:43:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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 10:43:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:43:20,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:20,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:20,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:20,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-07-13 10:43:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305152717] [2022-07-13 10:43:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:43:20,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:20,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:20,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:20,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 10:43:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:43:20,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 10:43:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:20,966 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 10:43:20,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:43:20,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305152717] [2022-07-13 10:43:20,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305152717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:43:20,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:43:20,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:43:20,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504537708] [2022-07-13 10:43:20,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:43:20,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:43:20,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:43:20,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:43:20,995 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:21,010 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-07-13 10:43:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:43:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 10:43:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:21,018 INFO L225 Difference]: With dead ends: 56 [2022-07-13 10:43:21,018 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:43:21,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:43:21,023 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:21,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:43:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:43:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-13 10:43:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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 10:43:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-07-13 10:43:21,050 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-07-13 10:43:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:21,050 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-13 10:43:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-07-13 10:43:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:43:21,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:21,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:21,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:21,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-07-13 10:43:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653449940] [2022-07-13 10:43:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:43:21,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:21,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 10:43:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:43:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:43:21,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:21,351 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 10:43:21,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:43:21,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:21,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653449940] [2022-07-13 10:43:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653449940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:43:21,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:43:21,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:43:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80582092] [2022-07-13 10:43:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:43:21,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:43:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:43:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:43:21,355 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:21,535 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-07-13 10:43:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:43:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 10:43:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:21,541 INFO L225 Difference]: With dead ends: 48 [2022-07-13 10:43:21,541 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 10:43:21,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 10:43:21,542 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:21,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:43:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 10:43:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-13 10:43:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 10:43:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-13 10:43:21,547 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-07-13 10:43:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:21,547 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-13 10:43:21,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-13 10:43:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 10:43:21,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:21,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:21,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:21,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:21,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-07-13 10:43:21,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:21,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706717952] [2022-07-13 10:43:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:43:21,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:21,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:21,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 10:43:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:43:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:43:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:43:21,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:43:21,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:21,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706717952] [2022-07-13 10:43:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706717952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:43:21,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:43:21,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:43:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126498767] [2022-07-13 10:43:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:43:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:43:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:43:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:43:21,837 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 10:43:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:22,137 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-07-13 10:43:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:43:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10:43:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:22,138 INFO L225 Difference]: With dead ends: 67 [2022-07-13 10:43:22,138 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 10:43:22,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:43:22,140 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:22,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:43:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 10:43:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-07-13 10:43:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-13 10:43:22,146 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-13 10:43:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:22,146 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-13 10:43:22,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10:43:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-13 10:43:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 10:43:22,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:22,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:22,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:22,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:22,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-07-13 10:43:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:22,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449920723] [2022-07-13 10:43:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:43:22,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:22,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:22,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 10:43:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:43:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:43:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:43:22,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:43:22,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449920723] [2022-07-13 10:43:22,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449920723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:43:22,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:43:22,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:43:22,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467965661] [2022-07-13 10:43:22,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:43:22,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:43:22,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:43:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:43:22,442 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:43:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:22,678 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-07-13 10:43:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:43:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 10:43:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:22,679 INFO L225 Difference]: With dead ends: 67 [2022-07-13 10:43:22,679 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 10:43:22,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:43:22,681 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:22,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:43:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 10:43:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-07-13 10:43:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 10:43:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-13 10:43:22,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-13 10:43:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:22,687 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-13 10:43:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:43:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-13 10:43:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 10:43:22,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:22,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:22,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-13 10:43:22,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:22,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-07-13 10:43:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:22,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261525516] [2022-07-13 10:43:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:43:22,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:22,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:22,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:22,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 10:43:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:43:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:43:22,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:43:22,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:43:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:43:23,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261525516] [2022-07-13 10:43:23,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261525516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:43:23,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:43:23,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 10:43:23,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623170905] [2022-07-13 10:43:23,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:43:23,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:43:23,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:43:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:43:23,037 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:23,612 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-07-13 10:43:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:43:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 10:43:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:23,614 INFO L225 Difference]: With dead ends: 91 [2022-07-13 10:43:23,614 INFO L226 Difference]: Without dead ends: 62 [2022-07-13 10:43:23,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:43:23,615 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:23,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:43:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-13 10:43:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-07-13 10:43:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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 10:43:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-07-13 10:43:23,623 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2022-07-13 10:43:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:23,627 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-07-13 10:43:23,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-07-13 10:43:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 10:43:23,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:23,628 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:23,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:23,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2022-07-13 10:43:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549937115] [2022-07-13 10:43:23,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:43:23,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:23,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:23,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:23,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 10:43:23,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 10:43:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:43:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:43:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:43:23,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:43:23,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:23,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549937115] [2022-07-13 10:43:23,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549937115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:43:23,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:43:23,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:43:23,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805226715] [2022-07-13 10:43:23,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:43:23,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:43:23,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:43:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:43:23,945 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 10:43:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:24,287 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-13 10:43:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:43:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2022-07-13 10:43:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:24,296 INFO L225 Difference]: With dead ends: 121 [2022-07-13 10:43:24,296 INFO L226 Difference]: Without dead ends: 100 [2022-07-13 10:43:24,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:43:24,297 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:24,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:43:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-13 10:43:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-07-13 10:43:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 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 10:43:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-13 10:43:24,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2022-07-13 10:43:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:24,308 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-13 10:43:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 10:43:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-13 10:43:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:43:24,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:24,309 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:24,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-13 10:43:24,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:24,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2022-07-13 10:43:24,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:24,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766257310] [2022-07-13 10:43:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:43:24,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:24,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:24,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:24,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 10:43:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:43:24,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:43:24,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:43:24,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:43:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:43:24,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:24,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766257310] [2022-07-13 10:43:24,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766257310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:43:24,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:43:24,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-13 10:43:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368099344] [2022-07-13 10:43:24,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:43:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:43:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:43:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:43:24,910 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:26,683 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2022-07-13 10:43:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:43:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-13 10:43:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:26,684 INFO L225 Difference]: With dead ends: 166 [2022-07-13 10:43:26,685 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 10:43:26,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:43:26,686 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 363 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:26,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 198 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 10:43:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 10:43:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2022-07-13 10:43:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 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 10:43:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-13 10:43:26,710 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2022-07-13 10:43:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:26,711 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-13 10:43:26,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:43:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-13 10:43:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:43:26,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:26,715 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:26,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:26,927 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2022-07-13 10:43:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339161806] [2022-07-13 10:43:26,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:43:26,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:26,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:26,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:26,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 10:43:27,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:43:27,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:43:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 10:43:27,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 10:43:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:43:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 10:43:27,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339161806] [2022-07-13 10:43:27,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339161806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:43:27,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:43:27,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-13 10:43:27,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134814161] [2022-07-13 10:43:27,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:43:27,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:43:27,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:43:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:43:27,810 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 10:43:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:32,171 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2022-07-13 10:43:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:43:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 63 [2022-07-13 10:43:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:32,173 INFO L225 Difference]: With dead ends: 316 [2022-07-13 10:43:32,173 INFO L226 Difference]: Without dead ends: 223 [2022-07-13 10:43:32,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 10:43:32,175 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1416 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:32,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 678 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 10:43:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-13 10:43:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2022-07-13 10:43:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 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 10:43:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2022-07-13 10:43:32,195 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2022-07-13 10:43:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:32,195 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2022-07-13 10:43:32,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 10:43:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2022-07-13 10:43:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 10:43:32,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:32,197 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:32,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:32,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2022-07-13 10:43:32,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026023362] [2022-07-13 10:43:32,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:43:32,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:32,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:32,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:32,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 10:43:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 10:43:32,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:43:32,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:43:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-13 10:43:32,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:43:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-13 10:43:33,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:33,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026023362] [2022-07-13 10:43:33,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026023362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:43:33,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:43:33,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 10:43:33,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006855938] [2022-07-13 10:43:33,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:43:33,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:43:33,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:43:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:43:33,092 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 10:43:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:33,700 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2022-07-13 10:43:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:43:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2022-07-13 10:43:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:33,703 INFO L225 Difference]: With dead ends: 852 [2022-07-13 10:43:33,704 INFO L226 Difference]: Without dead ends: 703 [2022-07-13 10:43:33,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:43:33,705 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 267 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:33,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:43:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-13 10:43:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2022-07-13 10:43:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 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 10:43:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2022-07-13 10:43:33,768 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2022-07-13 10:43:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:33,768 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2022-07-13 10:43:33,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 10:43:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2022-07-13 10:43:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-13 10:43:33,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:33,782 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:33,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:33,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:33,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2022-07-13 10:43:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434868199] [2022-07-13 10:43:33,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:43:33,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:33,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:33,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 10:43:34,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:43:34,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:43:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 10:43:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:43:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2022-07-13 10:43:35,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:43:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2022-07-13 10:43:36,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:43:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434868199] [2022-07-13 10:43:36,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434868199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:43:36,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:43:36,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-13 10:43:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864598337] [2022-07-13 10:43:36,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:43:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:43:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:43:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:43:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 10:43:36,699 INFO L87 Difference]: Start difference. First operand 480 states and 609 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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 10:43:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:43:50,363 INFO L93 Difference]: Finished difference Result 1503 states and 2052 transitions. [2022-07-13 10:43:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 10:43:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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 411 [2022-07-13 10:43:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:43:50,367 INFO L225 Difference]: With dead ends: 1503 [2022-07-13 10:43:50,367 INFO L226 Difference]: Without dead ends: 1027 [2022-07-13 10:43:50,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 10:43:50,376 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 4502 mSDsluCounter, 2402 mSDsCounter, 0 mSdLazyCounter, 3585 mSolverCounterSat, 1683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4502 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1683 IncrementalHoareTripleChecker+Valid, 3585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:43:50,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4502 Valid, 2515 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1683 Valid, 3585 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-07-13 10:43:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-07-13 10:43:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 936. [2022-07-13 10:43:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.267379679144385) internal successors, (1185), 935 states have internal predecessors, (1185), 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 10:43:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1185 transitions. [2022-07-13 10:43:50,441 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1185 transitions. Word has length 411 [2022-07-13 10:43:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:43:50,441 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1185 transitions. [2022-07-13 10:43:50,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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 10:43:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1185 transitions. [2022-07-13 10:43:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-07-13 10:43:50,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:43:50,460 INFO L195 NwaCegarLoop]: trace histogram [184, 184, 184, 184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:43:50,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:43:50,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:43:50,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:43:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:43:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 788549945, now seen corresponding path program 5 times [2022-07-13 10:43:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:43:50,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085120103] [2022-07-13 10:43:50,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:43:50,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:43:50,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:43:50,678 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:43:50,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process