./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-lopstr16/break-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-lopstr16/break-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:09:07,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:09:07,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:09:07,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:09:07,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:09:07,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:09:07,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:09:07,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:09:07,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:09:07,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:09:07,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:09:07,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:09:07,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:09:07,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:09:07,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:09:07,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:09:07,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:09:07,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:09:07,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:09:07,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:09:07,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:09:07,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:09:07,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:09:07,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:09:07,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:09:07,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:09:07,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:09:07,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:09:07,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:09:07,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:09:07,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:09:07,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:09:07,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:09:07,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:09:07,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:09:07,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:09:07,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:09:07,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:09:07,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:09:07,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:09:07,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:09:07,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:09:07,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:09:07,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:09:07,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:09:07,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:09:07,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:09:07,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:09:07,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:09:07,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:09:07,268 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:09:07,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:09:07,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:09:07,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:09:07,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:09:07,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:09:07,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:09:07,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:09:07,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:09:07,270 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:09:07,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:09:07,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:09:07,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:09:07,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:09:07,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:09:07,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:09:07,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:09:07,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:09:07,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:09:07,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:09:07,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:09:07,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:09:07,272 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:09:07,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:09:07,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:09:07,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:09:07,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 [2021-12-21 10:09:07,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:09:07,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:09:07,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:09:07,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:09:07,496 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:09:07,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/break-2.i [2021-12-21 10:09:07,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fe1bc37/79145c25b2e7421fa004c705fb23b464/FLAG7f8fb7589 [2021-12-21 10:09:07,971 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:09:07,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-2.i [2021-12-21 10:09:07,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fe1bc37/79145c25b2e7421fa004c705fb23b464/FLAG7f8fb7589 [2021-12-21 10:09:08,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fe1bc37/79145c25b2e7421fa004c705fb23b464 [2021-12-21 10:09:08,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:09:08,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:09:08,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:09:08,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:09:08,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:09:08,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:09:08" (1/1) ... [2021-12-21 10:09:08,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@302c10ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:08, skipping insertion in model container [2021-12-21 10:09:08,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:09:08" (1/1) ... [2021-12-21 10:09:08,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:09:08,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:09:08,515 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-lopstr16/break-2.i[800,813] [2021-12-21 10:09:08,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:09:13,278 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:09:13,288 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-lopstr16/break-2.i[800,813] [2021-12-21 10:09:13,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:09:13,310 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:09:13,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13 WrapperNode [2021-12-21 10:09:13,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:09:13,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:09:13,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:09:13,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:09:13,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,337 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-21 10:09:13,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:09:13,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:09:13,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:09:13,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:09:13,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:09:13,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:09:13,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:09:13,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:09:13,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (1/1) ... [2021-12-21 10:09:13,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:09:13,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:13,396 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) [2021-12-21 10:09:13,420 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 [2021-12-21 10:09:13,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:09:13,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:09:13,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:09:13,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:09:13,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:09:13,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:09:13,492 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:09:13,493 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:09:13,610 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:09:13,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:09:13,615 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 10:09:13,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:09:13 BoogieIcfgContainer [2021-12-21 10:09:13,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:09:13,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:09:13,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:09:13,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:09:13,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:09:08" (1/3) ... [2021-12-21 10:09:13,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759ee112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:09:13, skipping insertion in model container [2021-12-21 10:09:13,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:09:13" (2/3) ... [2021-12-21 10:09:13,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759ee112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:09:13, skipping insertion in model container [2021-12-21 10:09:13,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:09:13" (3/3) ... [2021-12-21 10:09:13,624 INFO L111 eAbstractionObserver]: Analyzing ICFG break-2.i [2021-12-21 10:09:13,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:09:13,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:09:13,665 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:09:13,670 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:09:13,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:09:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 10:09:13,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:13,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:13,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:13,713 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-12-21 10:09:13,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:13,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292145297] [2021-12-21 10:09:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:13,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:13,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:13,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292145297] [2021-12-21 10:09:13,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292145297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:09:13,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:09:13,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:09:13,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185423625] [2021-12-21 10:09:13,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:09:13,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:09:13,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:09:13,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:09:13,868 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:13,878 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-12-21 10:09:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:09:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 10:09:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:13,885 INFO L225 Difference]: With dead ends: 29 [2021-12-21 10:09:13,885 INFO L226 Difference]: Without dead ends: 13 [2021-12-21 10:09:13,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:09:13,901 INFO L933 BasicCegarLoop]: 20 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, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:13,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:09:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-21 10:09:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-21 10:09:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-12-21 10:09:13,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-12-21 10:09:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:13,940 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-21 10:09:13,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-12-21 10:09:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 10:09:13,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:13,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:13,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:09:13,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-12-21 10:09:13,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:13,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142146580] [2021-12-21 10:09:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:13,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142146580] [2021-12-21 10:09:14,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142146580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:09:14,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:09:14,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:09:14,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010800941] [2021-12-21 10:09:14,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:09:14,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:09:14,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:09:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:09:14,012 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:14,036 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-12-21 10:09:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:09:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 10:09:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:14,037 INFO L225 Difference]: With dead ends: 31 [2021-12-21 10:09:14,037 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 10:09:14,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:09:14,039 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:14,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:09:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 10:09:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-12-21 10:09:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-21 10:09:14,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-12-21 10:09:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:14,044 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-21 10:09:14,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-21 10:09:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 10:09:14,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:14,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:14,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:09:14,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2021-12-21 10:09:14,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:14,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403656175] [2021-12-21 10:09:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:14,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:14,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403656175] [2021-12-21 10:09:14,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403656175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533079050] [2021-12-21 10:09:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:14,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:14,098 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) [2021-12-21 10:09:14,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:09:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:09:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533079050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:14,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:14,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 10:09:14,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103082493] [2021-12-21 10:09:14,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:14,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:09:14,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:09:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:09:14,241 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:14,290 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-21 10:09:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:09:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 10:09:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:14,295 INFO L225 Difference]: With dead ends: 50 [2021-12-21 10:09:14,295 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 10:09:14,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:09:14,297 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:14,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:09:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 10:09:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-12-21 10:09:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-21 10:09:14,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2021-12-21 10:09:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-21 10:09:14,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-21 10:09:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:09:14,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:14,311 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:14,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:14,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:14,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1774448108, now seen corresponding path program 1 times [2021-12-21 10:09:14,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:14,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561942981] [2021-12-21 10:09:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:14,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:14,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561942981] [2021-12-21 10:09:14,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561942981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:14,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89856210] [2021-12-21 10:09:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:14,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:14,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:14,683 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) [2021-12-21 10:09:14,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:09:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:09:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:14,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89856210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:14,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:14,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2021-12-21 10:09:14,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48197484] [2021-12-21 10:09:14,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:14,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:09:14,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:09:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:09:14,891 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:15,232 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-12-21 10:09:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 10:09:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:09:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:15,235 INFO L225 Difference]: With dead ends: 81 [2021-12-21 10:09:15,235 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 10:09:15,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-12-21 10:09:15,240 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:15,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 49 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:09:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 10:09:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-12-21 10:09:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-12-21 10:09:15,266 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 15 [2021-12-21 10:09:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:15,266 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-12-21 10:09:15,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-12-21 10:09:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 10:09:15,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:15,268 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:15,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:15,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 10:09:15,490 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1157744319, now seen corresponding path program 1 times [2021-12-21 10:09:15,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:15,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293017960] [2021-12-21 10:09:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:15,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:15,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293017960] [2021-12-21 10:09:15,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293017960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271047506] [2021-12-21 10:09:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:15,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:15,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:15,580 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) [2021-12-21 10:09:15,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:09:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:09:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:15,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:15,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271047506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:15,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:15,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-21 10:09:15,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700541654] [2021-12-21 10:09:15,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:15,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:09:15,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:09:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:09:15,856 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:15,988 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2021-12-21 10:09:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:09:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 32 [2021-12-21 10:09:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:15,992 INFO L225 Difference]: With dead ends: 181 [2021-12-21 10:09:15,992 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 10:09:15,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:09:15,994 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 293 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:15,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 64 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:09:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 10:09:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2021-12-21 10:09:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-12-21 10:09:16,019 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 32 [2021-12-21 10:09:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:16,020 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-12-21 10:09:16,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-12-21 10:09:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:09:16,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:16,025 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:16,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:16,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1792167871, now seen corresponding path program 2 times [2021-12-21 10:09:16,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:16,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718209086] [2021-12-21 10:09:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:16,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:16,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718209086] [2021-12-21 10:09:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718209086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258530052] [2021-12-21 10:09:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:09:16,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:16,434 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) [2021-12-21 10:09:16,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:09:16,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:09:16,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:09:16,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 10:09:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:16,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258530052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:17,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:17,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-21 10:09:17,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265414001] [2021-12-21 10:09:17,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:17,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 10:09:17,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 10:09:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 10:09:17,092 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:17,353 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2021-12-21 10:09:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 10:09:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 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 56 [2021-12-21 10:09:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:17,355 INFO L225 Difference]: With dead ends: 381 [2021-12-21 10:09:17,355 INFO L226 Difference]: Without dead ends: 306 [2021-12-21 10:09:17,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 10:09:17,357 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 480 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:17,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 136 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:09:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-21 10:09:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 249. [2021-12-21 10:09:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.125) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-12-21 10:09:17,371 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 56 [2021-12-21 10:09:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:17,371 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-12-21 10:09:17,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-12-21 10:09:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 10:09:17,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:17,372 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:17,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:17,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:17,599 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash -485334593, now seen corresponding path program 3 times [2021-12-21 10:09:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:17,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99781650] [2021-12-21 10:09:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:17,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:18,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99781650] [2021-12-21 10:09:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99781650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740412906] [2021-12-21 10:09:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:09:18,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:18,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:18,166 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) [2021-12-21 10:09:18,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:09:23,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-21 10:09:23,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:09:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 10:09:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:23,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:24,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740412906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:24,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:24,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2021-12-21 10:09:24,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440735053] [2021-12-21 10:09:24,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:24,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-21 10:09:24,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-21 10:09:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 10:09:24,962 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:25,781 INFO L93 Difference]: Finished difference Result 781 states and 876 transitions. [2021-12-21 10:09:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 10:09:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 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 104 [2021-12-21 10:09:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:25,784 INFO L225 Difference]: With dead ends: 781 [2021-12-21 10:09:25,784 INFO L226 Difference]: Without dead ends: 626 [2021-12-21 10:09:25,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 10:09:25,787 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1435 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:25,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 260 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:09:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-21 10:09:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 505. [2021-12-21 10:09:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.125) internal successors, (567), 504 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 567 transitions. [2021-12-21 10:09:25,816 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 567 transitions. Word has length 104 [2021-12-21 10:09:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:25,817 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 567 transitions. [2021-12-21 10:09:25,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 567 transitions. [2021-12-21 10:09:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-21 10:09:25,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:25,819 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:25,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:26,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:26,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -502364737, now seen corresponding path program 4 times [2021-12-21 10:09:26,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:26,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744151307] [2021-12-21 10:09:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:26,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:27,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744151307] [2021-12-21 10:09:27,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744151307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268482314] [2021-12-21 10:09:27,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:09:27,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:27,648 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) [2021-12-21 10:09:27,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:09:27,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:09:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:09:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-21 10:09:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:28,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:32,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268482314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:32,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:32,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2021-12-21 10:09:32,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137524630] [2021-12-21 10:09:32,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:32,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-21 10:09:32,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-21 10:09:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2021-12-21 10:09:32,143 INFO L87 Difference]: Start difference. First operand 505 states and 567 transitions. Second operand has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:39,887 INFO L93 Difference]: Finished difference Result 1581 states and 1772 transitions. [2021-12-21 10:09:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-21 10:09:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 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 200 [2021-12-21 10:09:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:39,893 INFO L225 Difference]: With dead ends: 1581 [2021-12-21 10:09:39,893 INFO L226 Difference]: Without dead ends: 1266 [2021-12-21 10:09:39,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2021-12-21 10:09:39,898 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4549 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4549 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:39,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4549 Valid, 518 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [861 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:09:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-12-21 10:09:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1017. [2021-12-21 10:09:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.125) internal successors, (1143), 1016 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1143 transitions. [2021-12-21 10:09:39,932 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1143 transitions. Word has length 200 [2021-12-21 10:09:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:39,933 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1143 transitions. [2021-12-21 10:09:39,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1143 transitions. [2021-12-21 10:09:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-21 10:09:39,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:39,945 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 126, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:39,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:40,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:40,160 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash -101265985, now seen corresponding path program 5 times [2021-12-21 10:09:40,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:40,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954278493] [2021-12-21 10:09:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:40,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23880 backedges. 0 proven. 23877 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:09:45,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954278493] [2021-12-21 10:09:45,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954278493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208774034] [2021-12-21 10:09:45,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:09:45,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:45,622 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) [2021-12-21 10:09:45,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process