./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:11:45,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:11:45,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:11:45,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:11:45,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:11:45,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:11:45,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:11:45,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:11:45,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:11:45,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:11:45,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:11:45,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:11:45,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:11:45,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:11:45,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:11:45,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:11:45,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:11:45,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:11:45,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:11:45,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:11:45,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:11:45,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:11:45,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:11:45,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:11:45,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:11:45,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:11:45,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:11:45,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:11:45,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:11:45,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:11:45,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:11:45,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:11:45,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:11:45,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:11:45,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:11:45,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:11:45,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:11:45,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:11:45,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:11:45,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:11:45,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:11:45,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:11:45,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:11:45,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:11:45,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:11:45,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:11:45,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:11:45,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:11:45,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:11:45,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:11:45,334 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:11:45,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:11:45,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:11:45,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:11:45,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:11:45,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:11:45,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:11:45,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:11:45,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:11:45,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:11:45,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:11:45,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:11:45,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:11:45,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:11:45,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:11:45,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:11:45,338 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:11:45,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:11:45,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:11:45,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 [2021-12-28 01:11:45,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:11:45,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:11:45,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:11:45,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:11:45,586 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:11:45,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:11:45,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a8c6260/7328a608c949447fb47f525dcb4ed2c3/FLAG4e4812807 [2021-12-28 01:11:46,021 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:11:46,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:11:46,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a8c6260/7328a608c949447fb47f525dcb4ed2c3/FLAG4e4812807 [2021-12-28 01:11:46,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a8c6260/7328a608c949447fb47f525dcb4ed2c3 [2021-12-28 01:11:46,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:11:46,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:11:46,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:11:46,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:11:46,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:11:46,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c81be4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46, skipping insertion in model container [2021-12-28 01:11:46,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:11:46,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:11:46,228 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/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2021-12-28 01:11:46,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:11:46,235 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:11:46,308 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/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2021-12-28 01:11:46,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:11:46,318 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:11:46,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46 WrapperNode [2021-12-28 01:11:46,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:11:46,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:11:46,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:11:46,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:11:46,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,370 INFO L137 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 391 [2021-12-28 01:11:46,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:11:46,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:11:46,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:11:46,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:11:46,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:11:46,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:11:46,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:11:46,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:11:46,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (1/1) ... [2021-12-28 01:11:46,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:11:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:11:46,442 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) [2021-12-28 01:11:46,457 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 [2021-12-28 01:11:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:11:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:11:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:11:46,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:11:46,561 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:11:46,563 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:11:46,976 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:11:46,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:11:46,984 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:11:46,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:11:46 BoogieIcfgContainer [2021-12-28 01:11:46,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:11:46,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:11:46,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:11:46,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:11:46,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:11:46" (1/3) ... [2021-12-28 01:11:46,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a83ee2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:11:46, skipping insertion in model container [2021-12-28 01:11:46,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:11:46" (2/3) ... [2021-12-28 01:11:46,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a83ee2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:11:46, skipping insertion in model container [2021-12-28 01:11:46,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:11:46" (3/3) ... [2021-12-28 01:11:46,993 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:11:46,997 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:11:46,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:11:47,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:11:47,051 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 [2021-12-28 01:11:47,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:11:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 111 states have internal predecessors, (191), 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) [2021-12-28 01:11:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 01:11:47,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:47,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:47,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash -606038097, now seen corresponding path program 1 times [2021-12-28 01:11:47,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:47,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324738632] [2021-12-28 01:11:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:47,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:47,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324738632] [2021-12-28 01:11:47,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324738632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:47,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:47,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:11:47,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816856399] [2021-12-28 01:11:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:47,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:11:47,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:11:47,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:11:47,255 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 111 states have internal predecessors, (191), 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 18.5) internal successors, (37), 2 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) [2021-12-28 01:11:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:47,283 INFO L93 Difference]: Finished difference Result 175 states and 293 transitions. [2021-12-28 01:11:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:11:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 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 37 [2021-12-28 01:11:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:47,291 INFO L225 Difference]: With dead ends: 175 [2021-12-28 01:11:47,292 INFO L226 Difference]: Without dead ends: 108 [2021-12-28 01:11:47,294 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 [2021-12-28 01:11:47,300 INFO L933 BasicCegarLoop]: 184 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, 184 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 [2021-12-28 01:11:47,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-28 01:11:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-28 01:11:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 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) [2021-12-28 01:11:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 184 transitions. [2021-12-28 01:11:47,332 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 184 transitions. Word has length 37 [2021-12-28 01:11:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:47,333 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 184 transitions. [2021-12-28 01:11:47,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 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) [2021-12-28 01:11:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 184 transitions. [2021-12-28 01:11:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 01:11:47,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:47,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:47,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:11:47,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -331278483, now seen corresponding path program 1 times [2021-12-28 01:11:47,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942618181] [2021-12-28 01:11:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:47,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:47,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942618181] [2021-12-28 01:11:47,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942618181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:47,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:47,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:11:47,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564390285] [2021-12-28 01:11:47,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:47,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:11:47,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:11:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:11:47,452 INFO L87 Difference]: Start difference. First operand 108 states and 184 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-12-28 01:11:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:47,570 INFO L93 Difference]: Finished difference Result 174 states and 286 transitions. [2021-12-28 01:11:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:11:47,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 37 [2021-12-28 01:11:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:47,571 INFO L225 Difference]: With dead ends: 174 [2021-12-28 01:11:47,571 INFO L226 Difference]: Without dead ends: 108 [2021-12-28 01:11:47,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:11:47,573 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 3 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:47,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 685 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:11:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-28 01:11:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-28 01:11:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 107 states have internal predecessors, (144), 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) [2021-12-28 01:11:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 144 transitions. [2021-12-28 01:11:47,592 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 144 transitions. Word has length 37 [2021-12-28 01:11:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:47,593 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 144 transitions. [2021-12-28 01:11:47,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-12-28 01:11:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 144 transitions. [2021-12-28 01:11:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:11:47,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:47,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:47,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:11:47,595 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash 85749534, now seen corresponding path program 1 times [2021-12-28 01:11:47,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:47,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669721] [2021-12-28 01:11:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:47,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:47,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:47,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669721] [2021-12-28 01:11:47,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:47,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:47,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:47,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107179593] [2021-12-28 01:11:47,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:47,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:47,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:47,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:47,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:47,700 INFO L87 Difference]: Start difference. First operand 108 states and 144 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:47,731 INFO L93 Difference]: Finished difference Result 226 states and 330 transitions. [2021-12-28 01:11:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:47,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-28 01:11:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:47,735 INFO L225 Difference]: With dead ends: 226 [2021-12-28 01:11:47,735 INFO L226 Difference]: Without dead ends: 164 [2021-12-28 01:11:47,735 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 [2021-12-28 01:11:47,737 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 84 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:47,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-28 01:11:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-12-28 01:11:47,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.4285714285714286) internal successors, (230), 161 states have internal predecessors, (230), 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) [2021-12-28 01:11:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 230 transitions. [2021-12-28 01:11:47,750 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 230 transitions. Word has length 76 [2021-12-28 01:11:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:47,750 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 230 transitions. [2021-12-28 01:11:47,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 230 transitions. [2021-12-28 01:11:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:11:47,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:47,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:47,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:11:47,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash -659833196, now seen corresponding path program 1 times [2021-12-28 01:11:47,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:47,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494294896] [2021-12-28 01:11:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:47,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:47,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494294896] [2021-12-28 01:11:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494294896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:47,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:47,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:47,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604958738] [2021-12-28 01:11:47,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:47,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:47,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:47,861 INFO L87 Difference]: Start difference. First operand 162 states and 230 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:47,890 INFO L93 Difference]: Finished difference Result 382 states and 578 transitions. [2021-12-28 01:11:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-28 01:11:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:47,892 INFO L225 Difference]: With dead ends: 382 [2021-12-28 01:11:47,892 INFO L226 Difference]: Without dead ends: 266 [2021-12-28 01:11:47,892 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 [2021-12-28 01:11:47,893 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 80 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:47,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 311 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-28 01:11:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2021-12-28 01:11:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4866920152091254) internal successors, (391), 263 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) [2021-12-28 01:11:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 391 transitions. [2021-12-28 01:11:47,909 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 391 transitions. Word has length 76 [2021-12-28 01:11:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:47,909 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 391 transitions. [2021-12-28 01:11:47,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 391 transitions. [2021-12-28 01:11:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:11:47,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:47,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:11:47,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1695103242, now seen corresponding path program 1 times [2021-12-28 01:11:47,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:47,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021466041] [2021-12-28 01:11:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:47,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:48,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021466041] [2021-12-28 01:11:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021466041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:48,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:48,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:48,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193151010] [2021-12-28 01:11:48,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:48,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:48,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:48,013 INFO L87 Difference]: Start difference. First operand 264 states and 391 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:48,034 INFO L93 Difference]: Finished difference Result 676 states and 1041 transitions. [2021-12-28 01:11:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:48,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-28 01:11:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:48,037 INFO L225 Difference]: With dead ends: 676 [2021-12-28 01:11:48,037 INFO L226 Difference]: Without dead ends: 458 [2021-12-28 01:11:48,038 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 [2021-12-28 01:11:48,039 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 76 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:48,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 310 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-12-28 01:11:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2021-12-28 01:11:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5186813186813186) internal successors, (691), 455 states have internal predecessors, (691), 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) [2021-12-28 01:11:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 691 transitions. [2021-12-28 01:11:48,060 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 691 transitions. Word has length 76 [2021-12-28 01:11:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:48,060 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 691 transitions. [2021-12-28 01:11:48,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 691 transitions. [2021-12-28 01:11:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:11:48,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:48,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:48,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:11:48,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 100818560, now seen corresponding path program 1 times [2021-12-28 01:11:48,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:48,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439454921] [2021-12-28 01:11:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:48,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:48,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439454921] [2021-12-28 01:11:48,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439454921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:48,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:48,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:48,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243031710] [2021-12-28 01:11:48,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:48,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:48,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:48,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:48,127 INFO L87 Difference]: Start difference. First operand 456 states and 691 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:48,159 INFO L93 Difference]: Finished difference Result 1228 states and 1901 transitions. [2021-12-28 01:11:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-28 01:11:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:48,166 INFO L225 Difference]: With dead ends: 1228 [2021-12-28 01:11:48,167 INFO L226 Difference]: Without dead ends: 818 [2021-12-28 01:11:48,170 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 [2021-12-28 01:11:48,172 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:48,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-28 01:11:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 816. [2021-12-28 01:11:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 1.5300613496932516) internal successors, (1247), 815 states have internal predecessors, (1247), 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) [2021-12-28 01:11:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1247 transitions. [2021-12-28 01:11:48,214 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1247 transitions. Word has length 76 [2021-12-28 01:11:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:48,214 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1247 transitions. [2021-12-28 01:11:48,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1247 transitions. [2021-12-28 01:11:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:11:48,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:48,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:48,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:11:48,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash 438611702, now seen corresponding path program 1 times [2021-12-28 01:11:48,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:48,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865385856] [2021-12-28 01:11:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:48,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:48,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:48,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865385856] [2021-12-28 01:11:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865385856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:48,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:48,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:48,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087745764] [2021-12-28 01:11:48,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:48,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:48,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:48,284 INFO L87 Difference]: Start difference. First operand 816 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:48,343 INFO L93 Difference]: Finished difference Result 2260 states and 3489 transitions. [2021-12-28 01:11:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-28 01:11:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:48,350 INFO L225 Difference]: With dead ends: 2260 [2021-12-28 01:11:48,350 INFO L226 Difference]: Without dead ends: 1490 [2021-12-28 01:11:48,352 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 [2021-12-28 01:11:48,353 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 68 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:48,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 308 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-12-28 01:11:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1488. [2021-12-28 01:11:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.527236045729657) internal successors, (2271), 1487 states have internal predecessors, (2271), 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) [2021-12-28 01:11:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2271 transitions. [2021-12-28 01:11:48,411 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2271 transitions. Word has length 76 [2021-12-28 01:11:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:48,413 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2271 transitions. [2021-12-28 01:11:48,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2271 transitions. [2021-12-28 01:11:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:11:48,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:48,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:48,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:11:48,417 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1656597100, now seen corresponding path program 1 times [2021-12-28 01:11:48,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:48,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772165160] [2021-12-28 01:11:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:48,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:48,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:48,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772165160] [2021-12-28 01:11:48,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772165160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:48,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:48,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:11:48,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862275345] [2021-12-28 01:11:48,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:48,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:11:48,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:11:48,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:11:48,538 INFO L87 Difference]: Start difference. First operand 1488 states and 2271 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:49,202 INFO L93 Difference]: Finished difference Result 18792 states and 28971 transitions. [2021-12-28 01:11:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 01:11:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-28 01:11:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:49,256 INFO L225 Difference]: With dead ends: 18792 [2021-12-28 01:11:49,257 INFO L226 Difference]: Without dead ends: 17350 [2021-12-28 01:11:49,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:11:49,265 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1919 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:49,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 1953 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:11:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2021-12-28 01:11:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 2928. [2021-12-28 01:11:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 1.5138366928595832) internal successors, (4431), 2927 states have internal predecessors, (4431), 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) [2021-12-28 01:11:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4431 transitions. [2021-12-28 01:11:49,569 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4431 transitions. Word has length 76 [2021-12-28 01:11:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:49,572 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 4431 transitions. [2021-12-28 01:11:49,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4431 transitions. [2021-12-28 01:11:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 01:11:49,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:49,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:49,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:11:49,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1436220828, now seen corresponding path program 1 times [2021-12-28 01:11:49,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130241168] [2021-12-28 01:11:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:49,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:49,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:49,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130241168] [2021-12-28 01:11:49,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130241168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:49,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:49,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:49,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31553627] [2021-12-28 01:11:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:49,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:49,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:49,628 INFO L87 Difference]: Start difference. First operand 2928 states and 4431 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:49,912 INFO L93 Difference]: Finished difference Result 8340 states and 12593 transitions. [2021-12-28 01:11:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-28 01:11:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:49,926 INFO L225 Difference]: With dead ends: 8340 [2021-12-28 01:11:49,926 INFO L226 Difference]: Without dead ends: 5458 [2021-12-28 01:11:49,929 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 [2021-12-28 01:11:49,929 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 59 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:49,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 232 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2021-12-28 01:11:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5392. [2021-12-28 01:11:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.4808013355592655) internal successors, (7983), 5391 states have internal predecessors, (7983), 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) [2021-12-28 01:11:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7983 transitions. [2021-12-28 01:11:50,251 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7983 transitions. Word has length 78 [2021-12-28 01:11:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 7983 transitions. [2021-12-28 01:11:50,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7983 transitions. [2021-12-28 01:11:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 01:11:50,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:50,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:50,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:11:50,253 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1502714340, now seen corresponding path program 1 times [2021-12-28 01:11:50,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:50,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191254787] [2021-12-28 01:11:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:50,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:50,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:50,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191254787] [2021-12-28 01:11:50,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191254787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:50,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:50,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:11:50,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004807669] [2021-12-28 01:11:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:50,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:11:50,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:11:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:11:50,436 INFO L87 Difference]: Start difference. First operand 5392 states and 7983 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:50,938 INFO L93 Difference]: Finished difference Result 10740 states and 15921 transitions. [2021-12-28 01:11:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:11:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-28 01:11:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:50,956 INFO L225 Difference]: With dead ends: 10740 [2021-12-28 01:11:50,957 INFO L226 Difference]: Without dead ends: 5394 [2021-12-28 01:11:50,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:11:50,962 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 347 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:50,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 710 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:11:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2021-12-28 01:11:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 5392. [2021-12-28 01:11:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.4689296976442219) internal successors, (7919), 5391 states have internal predecessors, (7919), 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) [2021-12-28 01:11:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7919 transitions. [2021-12-28 01:11:51,258 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7919 transitions. Word has length 78 [2021-12-28 01:11:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:51,258 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 7919 transitions. [2021-12-28 01:11:51,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:11:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7919 transitions. [2021-12-28 01:11:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 01:11:51,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:51,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:51,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:11:51,260 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:51,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1075218669, now seen corresponding path program 1 times [2021-12-28 01:11:51,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:51,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612134877] [2021-12-28 01:11:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:51,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:51,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612134877] [2021-12-28 01:11:51,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612134877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:51,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:51,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:11:51,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493469507] [2021-12-28 01:11:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:51,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:11:51,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:11:51,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:11:51,313 INFO L87 Difference]: Start difference. First operand 5392 states and 7919 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2021-12-28 01:11:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:51,929 INFO L93 Difference]: Finished difference Result 9362 states and 13674 transitions. [2021-12-28 01:11:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:11:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 79 [2021-12-28 01:11:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:51,944 INFO L225 Difference]: With dead ends: 9362 [2021-12-28 01:11:51,944 INFO L226 Difference]: Without dead ends: 9360 [2021-12-28 01:11:51,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:11:51,947 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 264 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:51,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 629 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-12-28 01:11:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 5584. [2021-12-28 01:11:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5583 states have (on average 1.447071466953251) internal successors, (8079), 5583 states have internal predecessors, (8079), 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) [2021-12-28 01:11:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 8079 transitions. [2021-12-28 01:11:52,277 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 8079 transitions. Word has length 79 [2021-12-28 01:11:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:52,277 INFO L470 AbstractCegarLoop]: Abstraction has 5584 states and 8079 transitions. [2021-12-28 01:11:52,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2021-12-28 01:11:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 8079 transitions. [2021-12-28 01:11:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 01:11:52,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:52,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:52,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:11:52,279 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash 809566587, now seen corresponding path program 1 times [2021-12-28 01:11:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740109445] [2021-12-28 01:11:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:52,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:11:52,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740109445] [2021-12-28 01:11:52,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740109445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:52,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:52,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:11:52,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711419178] [2021-12-28 01:11:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:52,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:11:52,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:11:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:11:52,310 INFO L87 Difference]: Start difference. First operand 5584 states and 8079 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-12-28 01:11:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:52,714 INFO L93 Difference]: Finished difference Result 11223 states and 16341 transitions. [2021-12-28 01:11:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:11:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-12-28 01:11:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:52,728 INFO L225 Difference]: With dead ends: 11223 [2021-12-28 01:11:52,728 INFO L226 Difference]: Without dead ends: 8148 [2021-12-28 01:11:52,733 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 [2021-12-28 01:11:52,734 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 85 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:52,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 317 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:11:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8148 states. [2021-12-28 01:11:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8148 to 8146. [2021-12-28 01:11:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8146 states, 8145 states have (on average 1.440024554941682) internal successors, (11729), 8145 states have internal predecessors, (11729), 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) [2021-12-28 01:11:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 11729 transitions. [2021-12-28 01:11:53,221 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 11729 transitions. Word has length 80 [2021-12-28 01:11:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:53,221 INFO L470 AbstractCegarLoop]: Abstraction has 8146 states and 11729 transitions. [2021-12-28 01:11:53,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-12-28 01:11:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 11729 transitions. [2021-12-28 01:11:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:11:53,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:53,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:53,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:11:53,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1318686152, now seen corresponding path program 1 times [2021-12-28 01:11:53,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:53,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009319591] [2021-12-28 01:11:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:53,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:11:53,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:53,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009319591] [2021-12-28 01:11:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009319591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:53,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:53,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:11:53,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221219551] [2021-12-28 01:11:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:53,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:11:53,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:11:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:11:53,295 INFO L87 Difference]: Start difference. First operand 8146 states and 11729 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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) [2021-12-28 01:11:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:11:55,862 INFO L93 Difference]: Finished difference Result 58336 states and 84040 transitions. [2021-12-28 01:11:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:11:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:11:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:11:55,962 INFO L225 Difference]: With dead ends: 58336 [2021-12-28 01:11:55,963 INFO L226 Difference]: Without dead ends: 50238 [2021-12-28 01:11:55,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:11:55,982 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 1455 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:11:55,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 978 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:11:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50238 states. [2021-12-28 01:11:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50238 to 16242. [2021-12-28 01:11:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16242 states, 16241 states have (on average 1.4354411674157994) internal successors, (23313), 16241 states have internal predecessors, (23313), 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) [2021-12-28 01:11:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16242 states to 16242 states and 23313 transitions. [2021-12-28 01:11:57,250 INFO L78 Accepts]: Start accepts. Automaton has 16242 states and 23313 transitions. Word has length 111 [2021-12-28 01:11:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:11:57,250 INFO L470 AbstractCegarLoop]: Abstraction has 16242 states and 23313 transitions. [2021-12-28 01:11:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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) [2021-12-28 01:11:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 16242 states and 23313 transitions. [2021-12-28 01:11:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:11:57,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:11:57,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:11:57,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:11:57,256 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:11:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:11:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1207498328, now seen corresponding path program 1 times [2021-12-28 01:11:57,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:11:57,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338546780] [2021-12-28 01:11:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:11:57,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:11:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:11:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:11:57,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:11:57,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338546780] [2021-12-28 01:11:57,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338546780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:11:57,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:11:57,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:11:57,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881595497] [2021-12-28 01:11:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:11:57,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:11:57,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:11:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:11:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:11:57,339 INFO L87 Difference]: Start difference. First operand 16242 states and 23313 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2021-12-28 01:12:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:00,391 INFO L93 Difference]: Finished difference Result 66432 states and 95624 transitions. [2021-12-28 01:12:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:12:00,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 111 [2021-12-28 01:12:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:00,490 INFO L225 Difference]: With dead ends: 66432 [2021-12-28 01:12:00,490 INFO L226 Difference]: Without dead ends: 58334 [2021-12-28 01:12:00,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:12:00,515 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1277 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:00,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1026 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58334 states. [2021-12-28 01:12:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58334 to 28402. [2021-12-28 01:12:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28402 states, 28401 states have (on average 1.4298440195767754) internal successors, (40609), 28401 states have internal predecessors, (40609), 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) [2021-12-28 01:12:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28402 states to 28402 states and 40609 transitions. [2021-12-28 01:12:02,612 INFO L78 Accepts]: Start accepts. Automaton has 28402 states and 40609 transitions. Word has length 111 [2021-12-28 01:12:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:02,613 INFO L470 AbstractCegarLoop]: Abstraction has 28402 states and 40609 transitions. [2021-12-28 01:12:02,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2021-12-28 01:12:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 28402 states and 40609 transitions. [2021-12-28 01:12:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:12:02,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:02,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:02,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:12:02,622 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1955829128, now seen corresponding path program 1 times [2021-12-28 01:12:02,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:02,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524419648] [2021-12-28 01:12:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:02,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 01:12:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524419648] [2021-12-28 01:12:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524419648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:02,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:02,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:12:02,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745924442] [2021-12-28 01:12:02,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:02,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:12:02,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:02,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:12:02,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:12:02,704 INFO L87 Difference]: Start difference. First operand 28402 states and 40609 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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) [2021-12-28 01:12:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:06,797 INFO L93 Difference]: Finished difference Result 74528 states and 107208 transitions. [2021-12-28 01:12:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:12:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:12:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:06,889 INFO L225 Difference]: With dead ends: 74528 [2021-12-28 01:12:06,890 INFO L226 Difference]: Without dead ends: 66430 [2021-12-28 01:12:06,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:12:06,912 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1243 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 1070 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66430 states. [2021-12-28 01:12:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66430 to 36498. [2021-12-28 01:12:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36498 states, 36497 states have (on average 1.4300627448831411) internal successors, (52193), 36497 states have internal predecessors, (52193), 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) [2021-12-28 01:12:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36498 states to 36498 states and 52193 transitions. [2021-12-28 01:12:09,464 INFO L78 Accepts]: Start accepts. Automaton has 36498 states and 52193 transitions. Word has length 111 [2021-12-28 01:12:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:09,465 INFO L470 AbstractCegarLoop]: Abstraction has 36498 states and 52193 transitions. [2021-12-28 01:12:09,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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) [2021-12-28 01:12:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 36498 states and 52193 transitions. [2021-12-28 01:12:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:12:09,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:09,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:09,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:12:09,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1103679128, now seen corresponding path program 1 times [2021-12-28 01:12:09,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807053836] [2021-12-28 01:12:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:09,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:12:09,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807053836] [2021-12-28 01:12:09,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807053836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:09,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:09,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:12:09,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743053318] [2021-12-28 01:12:09,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:09,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:12:09,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:09,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:12:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:12:09,536 INFO L87 Difference]: Start difference. First operand 36498 states and 52193 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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) [2021-12-28 01:12:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:14,747 INFO L93 Difference]: Finished difference Result 82624 states and 118792 transitions. [2021-12-28 01:12:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:12:14,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:12:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:14,858 INFO L225 Difference]: With dead ends: 82624 [2021-12-28 01:12:14,859 INFO L226 Difference]: Without dead ends: 74526 [2021-12-28 01:12:14,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:12:14,885 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1311 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:14,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 1112 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74526 states. [2021-12-28 01:12:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74526 to 44594. [2021-12-28 01:12:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44594 states, 44593 states have (on average 1.430202049649048) internal successors, (63777), 44593 states have internal predecessors, (63777), 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) [2021-12-28 01:12:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44594 states to 44594 states and 63777 transitions. [2021-12-28 01:12:18,198 INFO L78 Accepts]: Start accepts. Automaton has 44594 states and 63777 transitions. Word has length 111 [2021-12-28 01:12:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:18,198 INFO L470 AbstractCegarLoop]: Abstraction has 44594 states and 63777 transitions. [2021-12-28 01:12:18,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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) [2021-12-28 01:12:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 44594 states and 63777 transitions. [2021-12-28 01:12:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:12:18,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:18,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:18,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:12:18,206 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -317316424, now seen corresponding path program 1 times [2021-12-28 01:12:18,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767066805] [2021-12-28 01:12:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:18,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:12:18,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:18,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767066805] [2021-12-28 01:12:18,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767066805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:18,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:18,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:12:18,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789116325] [2021-12-28 01:12:18,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:18,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:12:18,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:12:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:12:18,275 INFO L87 Difference]: Start difference. First operand 44594 states and 63777 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 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) [2021-12-28 01:12:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:24,373 INFO L93 Difference]: Finished difference Result 90720 states and 130376 transitions. [2021-12-28 01:12:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:12:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:12:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:24,496 INFO L225 Difference]: With dead ends: 90720 [2021-12-28 01:12:24,496 INFO L226 Difference]: Without dead ends: 82622 [2021-12-28 01:12:24,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:12:24,532 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 1429 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:24,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 1025 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82622 states. [2021-12-28 01:12:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82622 to 52690. [2021-12-28 01:12:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52690 states, 52689 states have (on average 1.4302985442881815) internal successors, (75361), 52689 states have internal predecessors, (75361), 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) [2021-12-28 01:12:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52690 states to 52690 states and 75361 transitions. [2021-12-28 01:12:29,277 INFO L78 Accepts]: Start accepts. Automaton has 52690 states and 75361 transitions. Word has length 111 [2021-12-28 01:12:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:29,278 INFO L470 AbstractCegarLoop]: Abstraction has 52690 states and 75361 transitions. [2021-12-28 01:12:29,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 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) [2021-12-28 01:12:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 52690 states and 75361 transitions. [2021-12-28 01:12:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 01:12:29,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:29,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:29,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:12:29,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1591238992, now seen corresponding path program 1 times [2021-12-28 01:12:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175924988] [2021-12-28 01:12:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:29,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:29,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175924988] [2021-12-28 01:12:29,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175924988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:29,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:29,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:29,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354588139] [2021-12-28 01:12:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:29,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:29,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:29,323 INFO L87 Difference]: Start difference. First operand 52690 states and 75361 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-12-28 01:12:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:32,280 INFO L93 Difference]: Finished difference Result 89336 states and 128236 transitions. [2021-12-28 01:12:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2021-12-28 01:12:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:32,337 INFO L225 Difference]: With dead ends: 89336 [2021-12-28 01:12:32,337 INFO L226 Difference]: Without dead ends: 36694 [2021-12-28 01:12:32,376 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 [2021-12-28 01:12:32,377 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 63 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:32,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 320 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-12-28 01:12:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 36692. [2021-12-28 01:12:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36692 states, 36691 states have (on average 1.4310048785805785) internal successors, (52505), 36691 states have internal predecessors, (52505), 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) [2021-12-28 01:12:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36692 states to 36692 states and 52505 transitions. [2021-12-28 01:12:35,467 INFO L78 Accepts]: Start accepts. Automaton has 36692 states and 52505 transitions. Word has length 113 [2021-12-28 01:12:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:35,467 INFO L470 AbstractCegarLoop]: Abstraction has 36692 states and 52505 transitions. [2021-12-28 01:12:35,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-12-28 01:12:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 36692 states and 52505 transitions. [2021-12-28 01:12:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 01:12:35,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:35,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:35,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:12:35,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash 406305469, now seen corresponding path program 1 times [2021-12-28 01:12:35,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:35,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791927830] [2021-12-28 01:12:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:35,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:12:35,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791927830] [2021-12-28 01:12:35,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791927830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:35,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:35,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:12:35,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483546113] [2021-12-28 01:12:35,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:35,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:12:35,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:12:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:12:35,543 INFO L87 Difference]: Start difference. First operand 36692 states and 52505 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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) [2021-12-28 01:12:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:41,178 INFO L93 Difference]: Finished difference Result 70498 states and 101280 transitions. [2021-12-28 01:12:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:12:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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 113 [2021-12-28 01:12:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:41,270 INFO L225 Difference]: With dead ends: 70498 [2021-12-28 01:12:41,270 INFO L226 Difference]: Without dead ends: 64864 [2021-12-28 01:12:41,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:12:41,292 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1439 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:41,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 963 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64864 states. [2021-12-28 01:12:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64864 to 42324. [2021-12-28 01:12:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42324 states, 42323 states have (on average 1.4311131063487939) internal successors, (60569), 42323 states have internal predecessors, (60569), 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) [2021-12-28 01:12:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42324 states to 42324 states and 60569 transitions. [2021-12-28 01:12:45,175 INFO L78 Accepts]: Start accepts. Automaton has 42324 states and 60569 transitions. Word has length 113 [2021-12-28 01:12:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:45,175 INFO L470 AbstractCegarLoop]: Abstraction has 42324 states and 60569 transitions. [2021-12-28 01:12:45,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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) [2021-12-28 01:12:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 42324 states and 60569 transitions. [2021-12-28 01:12:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 01:12:45,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:45,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:12:45,182 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash 635879691, now seen corresponding path program 1 times [2021-12-28 01:12:45,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:45,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691227612] [2021-12-28 01:12:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:45,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:45,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691227612] [2021-12-28 01:12:45,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691227612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:12:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273411835] [2021-12-28 01:12:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:45,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:12:45,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:12:45,372 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) [2021-12-28 01:12:45,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:12:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:12:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:12:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:12:45,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:12:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:12:46,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273411835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:12:46,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:12:46,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-28 01:12:46,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705296830] [2021-12-28 01:12:46,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:12:46,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 01:12:46,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 01:12:46,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:12:46,205 INFO L87 Difference]: Start difference. First operand 42324 states and 60569 transitions. Second operand has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 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)