./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label19.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 2b69dfd7ce787b4bea7f704286d79d9dc2873c99a6634157ddcd6c7ea8551fd0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:21:06,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:21:06,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:21:06,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:21:06,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:21:06,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:21:06,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:21:06,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:21:06,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:21:06,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:21:06,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:21:06,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:21:06,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:21:06,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:21:06,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:21:06,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:21:06,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:21:06,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:21:06,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:21:06,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:21:06,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:21:06,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:21:06,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:21:06,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:21:06,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:21:06,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:21:06,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:21:06,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:21:06,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:21:06,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:21:06,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:21:06,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:21:06,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:21:06,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:21:06,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:21:06,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:21:06,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:21:06,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:21:06,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:21:06,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:21:06,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:21:06,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:21:06,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:21:06,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:21:06,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:21:06,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:21:06,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:21:06,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:21:06,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:21:06,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:21:06,334 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:21:06,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:21:06,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:21:06,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:21:06,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:21:06,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:21:06,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:21:06,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:21:06,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:21:06,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:21:06,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:21:06,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:21:06,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:21:06,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:21:06,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:21:06,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:21:06,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:21:06,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:21:06,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:21:06,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:21:06,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:21:06,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:21:06,345 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:21:06,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:21:06,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:21:06,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:21:06,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b69dfd7ce787b4bea7f704286d79d9dc2873c99a6634157ddcd6c7ea8551fd0 [2021-12-21 11:21:06,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:21:06,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:21:06,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:21:06,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:21:06,544 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:21:06,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label19.c [2021-12-21 11:21:06,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0830d5ca3/f3cd596087ed4cd98e1293236d15e315/FLAGfe6130d51 [2021-12-21 11:21:07,117 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:21:07,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label19.c [2021-12-21 11:21:07,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0830d5ca3/f3cd596087ed4cd98e1293236d15e315/FLAGfe6130d51 [2021-12-21 11:21:07,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0830d5ca3/f3cd596087ed4cd98e1293236d15e315 [2021-12-21 11:21:07,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:21:07,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:21:07,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:21:07,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:21:07,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:21:07,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:21:07" (1/1) ... [2021-12-21 11:21:07,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2addb5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:07, skipping insertion in model container [2021-12-21 11:21:07,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:21:07" (1/1) ... [2021-12-21 11:21:07,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:21:07,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:21:07,895 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/eca-rers2012/Problem17_label19.c[6359,6372] [2021-12-21 11:21:08,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:21:08,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:21:08,361 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/eca-rers2012/Problem17_label19.c[6359,6372] [2021-12-21 11:21:08,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:21:08,582 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:21:08,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08 WrapperNode [2021-12-21 11:21:08,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:21:08,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:21:08,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:21:08,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:21:08,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:08,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:08,862 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-21 11:21:08,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:21:08,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:21:08,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:21:08,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:21:08,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:08,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:08,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:08,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:09,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:09,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:09,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:09,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:21:09,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:21:09,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:21:09,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:21:09,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (1/1) ... [2021-12-21 11:21:09,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:21:09,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:21:09,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:21:09,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:21:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:21:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:21:09,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:21:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:21:09,277 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:21:09,278 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:21:11,567 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:21:11,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:21:11,578 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:21:11,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:21:11 BoogieIcfgContainer [2021-12-21 11:21:11,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:21:11,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:21:11,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:21:11,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:21:11,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:21:07" (1/3) ... [2021-12-21 11:21:11,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624f5373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:21:11, skipping insertion in model container [2021-12-21 11:21:11,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:08" (2/3) ... [2021-12-21 11:21:11,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624f5373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:21:11, skipping insertion in model container [2021-12-21 11:21:11,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:21:11" (3/3) ... [2021-12-21 11:21:11,587 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label19.c [2021-12-21 11:21:11,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:21:11,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:21:11,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:21:11,641 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:21:11,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:21:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 11:21:11,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:11,670 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] [2021-12-21 11:21:11,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2021-12-21 11:21:11,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:11,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359783346] [2021-12-21 11:21:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:11,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:11,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:11,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359783346] [2021-12-21 11:21:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359783346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:11,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:11,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:21:11,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43159796] [2021-12-21 11:21:11,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:11,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:11,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:11,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:11,859 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:13,953 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-21 11:21:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:13,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-21 11:21:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:13,970 INFO L225 Difference]: With dead ends: 1642 [2021-12-21 11:21:13,970 INFO L226 Difference]: Without dead ends: 975 [2021-12-21 11:21:13,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:13,976 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 448 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:13,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:21:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-21 11:21:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-21 11:21:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-21 11:21:14,056 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 42 [2021-12-21 11:21:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:14,056 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-21 11:21:14,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-21 11:21:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 11:21:14,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:14,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:21:14,061 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash 214146598, now seen corresponding path program 1 times [2021-12-21 11:21:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:14,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180839674] [2021-12-21 11:21:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:14,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:14,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:14,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180839674] [2021-12-21 11:21:14,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180839674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:14,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:14,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:14,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068689023] [2021-12-21 11:21:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:14,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:14,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:14,184 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 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) [2021-12-21 11:21:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:16,030 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-21 11:21:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 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 112 [2021-12-21 11:21:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:16,037 INFO L225 Difference]: With dead ends: 2814 [2021-12-21 11:21:16,037 INFO L226 Difference]: Without dead ends: 1844 [2021-12-21 11:21:16,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:16,039 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 449 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:16,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:21:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-21 11:21:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-21 11:21:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-21 11:21:16,068 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 112 [2021-12-21 11:21:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:16,069 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-21 11:21:16,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 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) [2021-12-21 11:21:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-21 11:21:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 11:21:16,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:16,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:16,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:21:16,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 579168329, now seen corresponding path program 1 times [2021-12-21 11:21:16,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723654022] [2021-12-21 11:21:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:16,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:16,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:16,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723654022] [2021-12-21 11:21:16,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723654022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:16,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:16,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:21:16,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304470395] [2021-12-21 11:21:16,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:16,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:16,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:16,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:16,161 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:17,734 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-12-21 11:21:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-21 11:21:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:17,742 INFO L225 Difference]: With dead ends: 5395 [2021-12-21 11:21:17,742 INFO L226 Difference]: Without dead ends: 2701 [2021-12-21 11:21:17,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:17,746 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:17,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:21:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-12-21 11:21:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-12-21 11:21:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-12-21 11:21:17,776 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 134 [2021-12-21 11:21:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:17,777 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-12-21 11:21:17,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-12-21 11:21:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-21 11:21:17,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:17,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:17,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:21:17,780 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -855731843, now seen corresponding path program 1 times [2021-12-21 11:21:17,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:17,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522567591] [2021-12-21 11:21:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:17,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:17,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:17,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522567591] [2021-12-21 11:21:17,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522567591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:17,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:17,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:17,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762412446] [2021-12-21 11:21:17,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:17,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:17,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:17,942 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:19,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:19,578 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-12-21 11:21:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:19,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-21 11:21:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:19,589 INFO L225 Difference]: With dead ends: 7108 [2021-12-21 11:21:19,589 INFO L226 Difference]: Without dead ends: 4409 [2021-12-21 11:21:19,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:19,592 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:19,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:21:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-12-21 11:21:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-12-21 11:21:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-12-21 11:21:19,635 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 194 [2021-12-21 11:21:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:19,635 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-12-21 11:21:19,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-12-21 11:21:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-21 11:21:19,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:19,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:19,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:21:19,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash 995947064, now seen corresponding path program 1 times [2021-12-21 11:21:19,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:19,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646670596] [2021-12-21 11:21:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:19,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 11:21:19,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646670596] [2021-12-21 11:21:19,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646670596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:19,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:19,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:19,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762480442] [2021-12-21 11:21:19,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:19,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:19,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:19,708 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:21,206 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-12-21 11:21:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 196 [2021-12-21 11:21:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:21,223 INFO L225 Difference]: With dead ends: 10936 [2021-12-21 11:21:21,224 INFO L226 Difference]: Without dead ends: 6528 [2021-12-21 11:21:21,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:21,230 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 409 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:21,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:21:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-12-21 11:21:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-12-21 11:21:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-12-21 11:21:21,335 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 196 [2021-12-21 11:21:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:21,336 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-12-21 11:21:21,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-12-21 11:21:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-21 11:21:21,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:21,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:21,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:21:21,342 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1902352254, now seen corresponding path program 1 times [2021-12-21 11:21:21,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:21,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387133060] [2021-12-21 11:21:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:21:21,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387133060] [2021-12-21 11:21:21,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387133060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:21,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:21,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:21,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965884463] [2021-12-21 11:21:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:21,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:21,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:21,458 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:23,076 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-12-21 11:21:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:23,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 262 [2021-12-21 11:21:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:23,096 INFO L225 Difference]: With dead ends: 10045 [2021-12-21 11:21:23,096 INFO L226 Difference]: Without dead ends: 5665 [2021-12-21 11:21:23,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:23,102 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 394 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:23,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:21:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-12-21 11:21:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-12-21 11:21:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-12-21 11:21:23,168 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 262 [2021-12-21 11:21:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-12-21 11:21:23,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-12-21 11:21:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-21 11:21:23,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:23,171 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:23,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:21:23,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -773816133, now seen corresponding path program 1 times [2021-12-21 11:21:23,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:23,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194378384] [2021-12-21 11:21:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:23,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-21 11:21:23,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:23,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194378384] [2021-12-21 11:21:23,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194378384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:23,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:23,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:23,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097862823] [2021-12-21 11:21:23,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:23,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:23,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:23,293 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:24,754 INFO L93 Difference]: Finished difference Result 12593 states and 14783 transitions. [2021-12-21 11:21:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 274 [2021-12-21 11:21:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:24,771 INFO L225 Difference]: With dead ends: 12593 [2021-12-21 11:21:24,771 INFO L226 Difference]: Without dead ends: 6936 [2021-12-21 11:21:24,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:24,776 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:24,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:21:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2021-12-21 11:21:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6936. [2021-12-21 11:21:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 1.1322278298485942) internal successors, (7852), 6935 states have internal predecessors, (7852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 7852 transitions. [2021-12-21 11:21:24,863 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 7852 transitions. Word has length 274 [2021-12-21 11:21:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:24,864 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 7852 transitions. [2021-12-21 11:21:24,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 7852 transitions. [2021-12-21 11:21:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-21 11:21:24,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:24,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:21:24,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:21:24,868 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash -944523490, now seen corresponding path program 1 times [2021-12-21 11:21:24,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:24,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818167015] [2021-12-21 11:21:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:24,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-21 11:21:24,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:24,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818167015] [2021-12-21 11:21:24,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818167015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:24,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:24,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:24,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682369090] [2021-12-21 11:21:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:24,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:24,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:24,960 INFO L87 Difference]: Start difference. First operand 6936 states and 7852 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:26,430 INFO L93 Difference]: Finished difference Result 16424 states and 18762 transitions. [2021-12-21 11:21:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 314 [2021-12-21 11:21:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:26,443 INFO L225 Difference]: With dead ends: 16424 [2021-12-21 11:21:26,443 INFO L226 Difference]: Without dead ends: 9490 [2021-12-21 11:21:26,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:26,449 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 463 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:26,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 330 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:21:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9490 states. [2021-12-21 11:21:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9490 to 8636. [2021-12-21 11:21:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 8635 states have (on average 1.1345686160972785) internal successors, (9797), 8635 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 9797 transitions. [2021-12-21 11:21:26,527 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 9797 transitions. Word has length 314 [2021-12-21 11:21:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:26,527 INFO L470 AbstractCegarLoop]: Abstraction has 8636 states and 9797 transitions. [2021-12-21 11:21:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 9797 transitions. [2021-12-21 11:21:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-21 11:21:26,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:26,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:26,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:21:26,532 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 678396003, now seen corresponding path program 1 times [2021-12-21 11:21:26,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:26,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798610965] [2021-12-21 11:21:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:26,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:21:26,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798610965] [2021-12-21 11:21:26,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798610965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:26,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:26,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:26,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816353413] [2021-12-21 11:21:26,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:26,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:26,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:26,643 INFO L87 Difference]: Start difference. First operand 8636 states and 9797 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:28,246 INFO L93 Difference]: Finished difference Result 23689 states and 26990 transitions. [2021-12-21 11:21:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 331 [2021-12-21 11:21:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:28,266 INFO L225 Difference]: With dead ends: 23689 [2021-12-21 11:21:28,266 INFO L226 Difference]: Without dead ends: 15055 [2021-12-21 11:21:28,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:28,273 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 459 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:28,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 807 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:21:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15055 states. [2021-12-21 11:21:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15055 to 14182. [2021-12-21 11:21:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 1.130315210492913) internal successors, (16029), 14181 states have internal predecessors, (16029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 16029 transitions. [2021-12-21 11:21:28,400 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 16029 transitions. Word has length 331 [2021-12-21 11:21:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:28,400 INFO L470 AbstractCegarLoop]: Abstraction has 14182 states and 16029 transitions. [2021-12-21 11:21:28,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 16029 transitions. [2021-12-21 11:21:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-12-21 11:21:28,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:28,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:28,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:21:28,408 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1326543376, now seen corresponding path program 1 times [2021-12-21 11:21:28,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262609307] [2021-12-21 11:21:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:28,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:28,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:28,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262609307] [2021-12-21 11:21:28,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262609307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:28,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:28,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917043252] [2021-12-21 11:21:28,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:21:28,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:21:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:21:28,524 INFO L87 Difference]: Start difference. First operand 14182 states and 16029 transitions. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:30,925 INFO L93 Difference]: Finished difference Result 34771 states and 39275 transitions. [2021-12-21 11:21:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:21:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 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 381 [2021-12-21 11:21:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:30,956 INFO L225 Difference]: With dead ends: 34771 [2021-12-21 11:21:30,956 INFO L226 Difference]: Without dead ends: 20166 [2021-12-21 11:21:30,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:21:30,971 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 629 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:30,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 244 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:21:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20166 states. [2021-12-21 11:21:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20166 to 20164. [2021-12-21 11:21:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 1.1312304716560035) internal successors, (22809), 20163 states have internal predecessors, (22809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 22809 transitions. [2021-12-21 11:21:31,165 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 22809 transitions. Word has length 381 [2021-12-21 11:21:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:31,166 INFO L470 AbstractCegarLoop]: Abstraction has 20164 states and 22809 transitions. [2021-12-21 11:21:31,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 22809 transitions. [2021-12-21 11:21:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-21 11:21:31,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:31,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:31,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:21:31,174 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -467665579, now seen corresponding path program 1 times [2021-12-21 11:21:31,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728717323] [2021-12-21 11:21:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:31,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:21:31,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:31,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728717323] [2021-12-21 11:21:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728717323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:31,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:31,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:31,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059638199] [2021-12-21 11:21:31,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:31,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:31,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:31,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:31,350 INFO L87 Difference]: Start difference. First operand 20164 states and 22809 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:33,014 INFO L93 Difference]: Finished difference Result 45882 states and 51904 transitions. [2021-12-21 11:21:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 402 [2021-12-21 11:21:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:33,049 INFO L225 Difference]: With dead ends: 45882 [2021-12-21 11:21:33,050 INFO L226 Difference]: Without dead ends: 25720 [2021-12-21 11:21:33,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:33,069 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 416 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:33,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 765 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:21:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2021-12-21 11:21:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 20153. [2021-12-21 11:21:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20153 states, 20152 states have (on average 1.1310539896784437) internal successors, (22793), 20152 states have internal predecessors, (22793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20153 states to 20153 states and 22793 transitions. [2021-12-21 11:21:33,350 INFO L78 Accepts]: Start accepts. Automaton has 20153 states and 22793 transitions. Word has length 402 [2021-12-21 11:21:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:33,351 INFO L470 AbstractCegarLoop]: Abstraction has 20153 states and 22793 transitions. [2021-12-21 11:21:33,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 20153 states and 22793 transitions. [2021-12-21 11:21:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-21 11:21:33,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:33,358 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:33,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:21:33,358 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1684945626, now seen corresponding path program 1 times [2021-12-21 11:21:33,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:33,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108339899] [2021-12-21 11:21:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:33,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-21 11:21:33,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108339899] [2021-12-21 11:21:33,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108339899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:33,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:33,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:33,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529731241] [2021-12-21 11:21:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:33,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:33,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:33,461 INFO L87 Difference]: Start difference. First operand 20153 states and 22793 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:35,293 INFO L93 Difference]: Finished difference Result 48404 states and 54963 transitions. [2021-12-21 11:21:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 403 [2021-12-21 11:21:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:35,320 INFO L225 Difference]: With dead ends: 48404 [2021-12-21 11:21:35,321 INFO L226 Difference]: Without dead ends: 28253 [2021-12-21 11:21:35,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:35,330 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 506 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 252 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:21:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28253 states. [2021-12-21 11:21:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28253 to 28236. [2021-12-21 11:21:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28236 states, 28235 states have (on average 1.1271117407472995) internal successors, (31824), 28235 states have internal predecessors, (31824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28236 states to 28236 states and 31824 transitions. [2021-12-21 11:21:35,589 INFO L78 Accepts]: Start accepts. Automaton has 28236 states and 31824 transitions. Word has length 403 [2021-12-21 11:21:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:35,590 INFO L470 AbstractCegarLoop]: Abstraction has 28236 states and 31824 transitions. [2021-12-21 11:21:35,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 28236 states and 31824 transitions. [2021-12-21 11:21:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-21 11:21:35,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:35,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:35,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:21:35,597 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:35,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1441159319, now seen corresponding path program 1 times [2021-12-21 11:21:35,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:35,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662721992] [2021-12-21 11:21:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:35,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 224 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:35,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662721992] [2021-12-21 11:21:35,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662721992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:21:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644322586] [2021-12-21 11:21:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:35,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:21:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:21:35,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:21:35,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:21:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:21:35,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:21:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 224 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:36,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:21:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644322586] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:21:37,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:21:37,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-21 11:21:37,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784571493] [2021-12-21 11:21:37,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:37,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:21:37,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:21:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:21:37,492 INFO L87 Difference]: Start difference. First operand 28236 states and 31824 transitions. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:40,648 INFO L93 Difference]: Finished difference Result 78207 states and 87757 transitions. [2021-12-21 11:21:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:21:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 410 [2021-12-21 11:21:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:40,702 INFO L225 Difference]: With dead ends: 78207 [2021-12-21 11:21:40,702 INFO L226 Difference]: Without dead ends: 48267 [2021-12-21 11:21:40,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 815 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:21:40,728 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 724 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:40,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 208 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:21:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48267 states. [2021-12-21 11:21:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48267 to 44010. [2021-12-21 11:21:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44010 states, 44009 states have (on average 1.1212933718103115) internal successors, (49347), 44009 states have internal predecessors, (49347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44010 states to 44010 states and 49347 transitions. [2021-12-21 11:21:41,305 INFO L78 Accepts]: Start accepts. Automaton has 44010 states and 49347 transitions. Word has length 410 [2021-12-21 11:21:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:41,305 INFO L470 AbstractCegarLoop]: Abstraction has 44010 states and 49347 transitions. [2021-12-21 11:21:41,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44010 states and 49347 transitions. [2021-12-21 11:21:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-12-21 11:21:41,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:41,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:41,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:21:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 11:21:41,524 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 927922568, now seen corresponding path program 1 times [2021-12-21 11:21:41,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254464459] [2021-12-21 11:21:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:41,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-21 11:21:41,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:41,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254464459] [2021-12-21 11:21:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254464459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:41,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:41,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124328056] [2021-12-21 11:21:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:41,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:41,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:41,723 INFO L87 Difference]: Start difference. First operand 44010 states and 49347 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:43,576 INFO L93 Difference]: Finished difference Result 102049 states and 114541 transitions. [2021-12-21 11:21:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 446 [2021-12-21 11:21:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:43,753 INFO L225 Difference]: With dead ends: 102049 [2021-12-21 11:21:43,754 INFO L226 Difference]: Without dead ends: 54627 [2021-12-21 11:21:43,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:43,769 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 500 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:43,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 734 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:21:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54627 states. [2021-12-21 11:21:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54627 to 52071. [2021-12-21 11:21:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52071 states, 52070 states have (on average 1.1085845976570001) internal successors, (57724), 52070 states have internal predecessors, (57724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52071 states to 52071 states and 57724 transitions. [2021-12-21 11:21:44,404 INFO L78 Accepts]: Start accepts. Automaton has 52071 states and 57724 transitions. Word has length 446 [2021-12-21 11:21:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:44,405 INFO L470 AbstractCegarLoop]: Abstraction has 52071 states and 57724 transitions. [2021-12-21 11:21:44,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 52071 states and 57724 transitions. [2021-12-21 11:21:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-21 11:21:44,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:44,412 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:44,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:21:44,412 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash 613060915, now seen corresponding path program 1 times [2021-12-21 11:21:44,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070541729] [2021-12-21 11:21:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:44,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:44,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070541729] [2021-12-21 11:21:44,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070541729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:44,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:44,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:21:44,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994663672] [2021-12-21 11:21:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:44,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:21:44,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:21:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:21:44,575 INFO L87 Difference]: Start difference. First operand 52071 states and 57724 transitions. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:47,620 INFO L93 Difference]: Finished difference Result 133967 states and 148181 transitions. [2021-12-21 11:21:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:21:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 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 448 [2021-12-21 11:21:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:47,712 INFO L225 Difference]: With dead ends: 133967 [2021-12-21 11:21:47,712 INFO L226 Difference]: Without dead ends: 81898 [2021-12-21 11:21:47,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:21:47,728 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 774 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:47,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 171 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:21:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81898 states. [2021-12-21 11:21:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81898 to 77638. [2021-12-21 11:21:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77638 states, 77637 states have (on average 1.1012403879593493) internal successors, (85497), 77637 states have internal predecessors, (85497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77638 states to 77638 states and 85497 transitions. [2021-12-21 11:21:48,778 INFO L78 Accepts]: Start accepts. Automaton has 77638 states and 85497 transitions. Word has length 448 [2021-12-21 11:21:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:48,779 INFO L470 AbstractCegarLoop]: Abstraction has 77638 states and 85497 transitions. [2021-12-21 11:21:48,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 77638 states and 85497 transitions. [2021-12-21 11:21:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-21 11:21:48,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:48,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:21:48,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash -717338311, now seen corresponding path program 1 times [2021-12-21 11:21:48,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169960778] [2021-12-21 11:21:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:48,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-12-21 11:21:49,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:49,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169960778] [2021-12-21 11:21:49,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169960778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:49,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:49,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:49,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043811602] [2021-12-21 11:21:49,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:49,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:49,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:49,092 INFO L87 Difference]: Start difference. First operand 77638 states and 85497 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:51,524 INFO L93 Difference]: Finished difference Result 168473 states and 185597 transitions. [2021-12-21 11:21:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 491 [2021-12-21 11:21:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:51,628 INFO L225 Difference]: With dead ends: 168473 [2021-12-21 11:21:51,628 INFO L226 Difference]: Without dead ends: 90837 [2021-12-21 11:21:51,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:51,658 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 452 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:51,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 372 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:21:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90837 states. [2021-12-21 11:21:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90837 to 85293. [2021-12-21 11:21:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85293 states, 85292 states have (on average 1.0996693711016274) internal successors, (93793), 85292 states have internal predecessors, (93793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85293 states to 85293 states and 93793 transitions. [2021-12-21 11:21:52,663 INFO L78 Accepts]: Start accepts. Automaton has 85293 states and 93793 transitions. Word has length 491 [2021-12-21 11:21:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:52,664 INFO L470 AbstractCegarLoop]: Abstraction has 85293 states and 93793 transitions. [2021-12-21 11:21:52,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 85293 states and 93793 transitions. [2021-12-21 11:21:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-12-21 11:21:52,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:52,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-12-21 11:21:52,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:21:52,676 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1143968982, now seen corresponding path program 1 times [2021-12-21 11:21:52,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:52,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609127449] [2021-12-21 11:21:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:52,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-21 11:21:52,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609127449] [2021-12-21 11:21:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609127449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:52,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:52,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525087677] [2021-12-21 11:21:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:52,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:52,864 INFO L87 Difference]: Start difference. First operand 85293 states and 93793 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:55,041 INFO L93 Difference]: Finished difference Result 179531 states and 197119 transitions. [2021-12-21 11:21:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 504 [2021-12-21 11:21:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:55,327 INFO L225 Difference]: With dead ends: 179531 [2021-12-21 11:21:55,327 INFO L226 Difference]: Without dead ends: 94240 [2021-12-21 11:21:55,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:55,360 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 455 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:55,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 371 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:21:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94240 states. [2021-12-21 11:21:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94240 to 84018. [2021-12-21 11:21:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84018 states, 84017 states have (on average 1.1001344965899758) internal successors, (92430), 84017 states have internal predecessors, (92430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84018 states to 84018 states and 92430 transitions. [2021-12-21 11:21:56,482 INFO L78 Accepts]: Start accepts. Automaton has 84018 states and 92430 transitions. Word has length 504 [2021-12-21 11:21:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:56,482 INFO L470 AbstractCegarLoop]: Abstraction has 84018 states and 92430 transitions. [2021-12-21 11:21:56,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 84018 states and 92430 transitions. [2021-12-21 11:21:56,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-21 11:21:56,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:56,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:56,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:21:56,496 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:56,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1761866527, now seen corresponding path program 1 times [2021-12-21 11:21:56,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722352881] [2021-12-21 11:21:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:56,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 266 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:56,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722352881] [2021-12-21 11:21:56,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722352881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:21:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717417168] [2021-12-21 11:21:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:56,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:21:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:21:56,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:21:56,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:21:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 11:21:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:21:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 266 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:57,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:21:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 266 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 11:21:59,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717417168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:21:59,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:21:59,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-21 11:21:59,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511983578] [2021-12-21 11:21:59,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:21:59,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 11:21:59,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 11:21:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 11:21:59,382 INFO L87 Difference]: Start difference. First operand 84018 states and 92430 transitions. Second operand has 10 states, 10 states have (on average 87.2) internal successors, (872), 9 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)