./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 588484d75150429774731f7aacf4daf77752c68fdc38fffa31465a5f910e2823 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:18:23,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:18:23,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:18:23,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:18:23,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:18:23,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:18:23,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:18:23,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:18:23,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:18:23,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:18:23,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:18:23,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:18:23,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:18:23,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:18:23,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:18:23,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:18:23,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:18:23,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:18:23,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:18:23,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:18:23,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:18:23,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:18:23,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:18:23,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:18:23,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:18:23,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:18:23,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:18:23,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:18:23,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:18:23,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:18:23,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:18:23,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:18:23,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:18:23,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:18:23,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:18:23,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:18:23,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:18:23,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:18:23,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:18:23,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:18:23,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:18:23,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:18:23,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:18:23,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:18:23,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:18:23,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:18:23,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:18:23,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:18:23,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:18:23,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:18:23,368 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:18:23,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:18:23,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:18:23,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:18:23,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:18:23,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:18:23,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:18:23,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:18:23,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:18:23,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:18:23,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:18:23,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:18:23,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:18:23,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:18:23,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:18:23,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:18:23,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:18:23,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:18:23,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:18:23,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:18:23,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:18:23,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:18:23,373 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:18:23,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:18:23,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:18:23,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:18:23,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588484d75150429774731f7aacf4daf77752c68fdc38fffa31465a5f910e2823 [2021-12-15 11:18:23,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:18:23,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:18:23,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:18:23,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:18:23,586 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:18:23,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c [2021-12-15 11:18:23,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97059c5ea/8eff379d676b42f1834a7528647ea3dd/FLAG917adb872 [2021-12-15 11:18:24,023 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:18:24,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c [2021-12-15 11:18:24,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97059c5ea/8eff379d676b42f1834a7528647ea3dd/FLAG917adb872 [2021-12-15 11:18:24,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97059c5ea/8eff379d676b42f1834a7528647ea3dd [2021-12-15 11:18:24,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:18:24,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:18:24,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:18:24,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:18:24,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:18:24,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd20125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24, skipping insertion in model container [2021-12-15 11:18:24,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:18:24,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:18:24,331 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c[14511,14524] [2021-12-15 11:18:24,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:18:24,345 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:18:24,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c[14511,14524] [2021-12-15 11:18:24,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:18:24,408 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:18:24,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24 WrapperNode [2021-12-15 11:18:24,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:18:24,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:18:24,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:18:24,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:18:24,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,455 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 479 [2021-12-15 11:18:24,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:18:24,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:18:24,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:18:24,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:18:24,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:18:24,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:18:24,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:18:24,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:18:24,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (1/1) ... [2021-12-15 11:18:24,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:18:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:18:24,530 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) [2021-12-15 11:18:24,548 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 [2021-12-15 11:18:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:18:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:18:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:18:24,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:18:24,653 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:18:24,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:18:25,043 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:18:25,049 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:18:25,050 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:18:25,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:18:25 BoogieIcfgContainer [2021-12-15 11:18:25,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:18:25,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:18:25,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:18:25,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:18:25,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:18:24" (1/3) ... [2021-12-15 11:18:25,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9eecbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:18:25, skipping insertion in model container [2021-12-15 11:18:25,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:24" (2/3) ... [2021-12-15 11:18:25,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9eecbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:18:25, skipping insertion in model container [2021-12-15 11:18:25,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:18:25" (3/3) ... [2021-12-15 11:18:25,063 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c [2021-12-15 11:18:25,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:18:25,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:18:25,103 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:18:25,108 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 [2021-12-15 11:18:25,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:18:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.748299319727891) internal successors, (257), 148 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:18:25,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:25,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:25,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2021-12-15 11:18:25,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:25,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193210398] [2021-12-15 11:18:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:25,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:25,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:25,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193210398] [2021-12-15 11:18:25,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193210398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:25,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:25,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:18:25,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685478867] [2021-12-15 11:18:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:25,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:18:25,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:18:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:18:25,440 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.748299319727891) internal successors, (257), 148 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:25,474 INFO L93 Difference]: Finished difference Result 235 states and 403 transitions. [2021-12-15 11:18:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:18:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:18:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:25,486 INFO L225 Difference]: With dead ends: 235 [2021-12-15 11:18:25,486 INFO L226 Difference]: Without dead ends: 145 [2021-12-15 11:18:25,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:18:25,492 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:25,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-15 11:18:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-15 11:18:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 144 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) [2021-12-15 11:18:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 250 transitions. [2021-12-15 11:18:25,535 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 250 transitions. Word has length 37 [2021-12-15 11:18:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:25,536 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 250 transitions. [2021-12-15 11:18:25,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 250 transitions. [2021-12-15 11:18:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:18:25,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:25,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:25,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:18:25,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:25,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2021-12-15 11:18:25,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:25,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249818928] [2021-12-15 11:18:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:25,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:25,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:25,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249818928] [2021-12-15 11:18:25,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249818928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:25,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:25,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:25,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345675782] [2021-12-15 11:18:25,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:25,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:25,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:25,641 INFO L87 Difference]: Start difference. First operand 145 states and 250 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:25,708 INFO L93 Difference]: Finished difference Result 234 states and 396 transitions. [2021-12-15 11:18:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:25,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:18:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:25,710 INFO L225 Difference]: With dead ends: 234 [2021-12-15 11:18:25,710 INFO L226 Difference]: Without dead ends: 145 [2021-12-15 11:18:25,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:25,711 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 3 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:25,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 959 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-15 11:18:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-15 11:18:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5277777777777777) internal successors, (220), 144 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 220 transitions. [2021-12-15 11:18:25,718 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 220 transitions. Word has length 37 [2021-12-15 11:18:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:25,719 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 220 transitions. [2021-12-15 11:18:25,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 220 transitions. [2021-12-15 11:18:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:18:25,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:25,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:25,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:18:25,721 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2021-12-15 11:18:25,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:25,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262144047] [2021-12-15 11:18:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:25,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:25,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262144047] [2021-12-15 11:18:25,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262144047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:25,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:25,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:25,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540900601] [2021-12-15 11:18:25,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:25,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:25,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:25,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:25,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:25,789 INFO L87 Difference]: Start difference. First operand 145 states and 220 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:25,823 INFO L93 Difference]: Finished difference Result 305 states and 486 transitions. [2021-12-15 11:18:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 11:18:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:25,826 INFO L225 Difference]: With dead ends: 305 [2021-12-15 11:18:25,826 INFO L226 Difference]: Without dead ends: 220 [2021-12-15 11:18:25,828 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 [2021-12-15 11:18:25,834 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 115 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:25,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 388 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-15 11:18:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2021-12-15 11:18:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5555555555555556) internal successors, (336), 216 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 336 transitions. [2021-12-15 11:18:25,863 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 336 transitions. Word has length 66 [2021-12-15 11:18:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:25,863 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 336 transitions. [2021-12-15 11:18:25,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 336 transitions. [2021-12-15 11:18:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:18:25,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:25,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:25,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:18:25,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2021-12-15 11:18:25,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860881615] [2021-12-15 11:18:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:25,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:25,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:25,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860881615] [2021-12-15 11:18:25,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860881615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:25,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:25,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:25,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498109082] [2021-12-15 11:18:25,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:25,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:25,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:25,949 INFO L87 Difference]: Start difference. First operand 217 states and 336 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:25,976 INFO L93 Difference]: Finished difference Result 515 states and 824 transitions. [2021-12-15 11:18:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 11:18:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:25,980 INFO L225 Difference]: With dead ends: 515 [2021-12-15 11:18:25,980 INFO L226 Difference]: Without dead ends: 358 [2021-12-15 11:18:25,982 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 [2021-12-15 11:18:25,984 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:25,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 401 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-15 11:18:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2021-12-15 11:18:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.5835694050991502) internal successors, (559), 353 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 559 transitions. [2021-12-15 11:18:26,006 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 559 transitions. Word has length 68 [2021-12-15 11:18:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:26,007 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 559 transitions. [2021-12-15 11:18:26,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 559 transitions. [2021-12-15 11:18:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:18:26,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:26,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:26,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:18:26,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2021-12-15 11:18:26,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:26,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420417115] [2021-12-15 11:18:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:26,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:26,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:26,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420417115] [2021-12-15 11:18:26,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420417115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:26,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:26,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:26,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738582539] [2021-12-15 11:18:26,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:26,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:26,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:26,062 INFO L87 Difference]: Start difference. First operand 354 states and 559 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:26,088 INFO L93 Difference]: Finished difference Result 910 states and 1465 transitions. [2021-12-15 11:18:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-15 11:18:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:26,092 INFO L225 Difference]: With dead ends: 910 [2021-12-15 11:18:26,092 INFO L226 Difference]: Without dead ends: 616 [2021-12-15 11:18:26,093 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 [2021-12-15 11:18:26,094 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 111 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:26,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 402 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-12-15 11:18:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 610. [2021-12-15 11:18:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 1.5944170771756978) internal successors, (971), 609 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 971 transitions. [2021-12-15 11:18:26,126 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 971 transitions. Word has length 70 [2021-12-15 11:18:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:26,127 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 971 transitions. [2021-12-15 11:18:26,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 971 transitions. [2021-12-15 11:18:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:18:26,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:26,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:26,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:18:26,131 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2021-12-15 11:18:26,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224947637] [2021-12-15 11:18:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:26,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:26,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:26,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224947637] [2021-12-15 11:18:26,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224947637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:26,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:26,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:26,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869140611] [2021-12-15 11:18:26,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:26,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:26,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:26,202 INFO L87 Difference]: Start difference. First operand 610 states and 971 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:26,333 INFO L93 Difference]: Finished difference Result 2622 states and 4281 transitions. [2021-12-15 11:18:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:18:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:18:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:26,342 INFO L225 Difference]: With dead ends: 2622 [2021-12-15 11:18:26,342 INFO L226 Difference]: Without dead ends: 2072 [2021-12-15 11:18:26,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:26,344 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 936 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:26,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1286 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-15 11:18:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1092. [2021-12-15 11:18:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.6076993583868011) internal successors, (1754), 1091 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1754 transitions. [2021-12-15 11:18:26,382 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1754 transitions. Word has length 72 [2021-12-15 11:18:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:26,383 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1754 transitions. [2021-12-15 11:18:26,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1754 transitions. [2021-12-15 11:18:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 11:18:26,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:26,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:26,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:18:26,385 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2021-12-15 11:18:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460944889] [2021-12-15 11:18:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:26,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:26,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:26,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460944889] [2021-12-15 11:18:26,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460944889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:26,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:26,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:26,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352864843] [2021-12-15 11:18:26,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:26,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:26,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:26,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:26,438 INFO L87 Difference]: Start difference. First operand 1092 states and 1754 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:26,501 INFO L93 Difference]: Finished difference Result 3182 states and 5186 transitions. [2021-12-15 11:18:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-15 11:18:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:26,508 INFO L225 Difference]: With dead ends: 3182 [2021-12-15 11:18:26,509 INFO L226 Difference]: Without dead ends: 2150 [2021-12-15 11:18:26,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:26,511 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 413 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 723 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-15 11:18:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1612. [2021-12-15 11:18:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 1.6157666045934203) internal successors, (2603), 1611 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2603 transitions. [2021-12-15 11:18:26,556 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2603 transitions. Word has length 73 [2021-12-15 11:18:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:26,556 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2603 transitions. [2021-12-15 11:18:26,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2603 transitions. [2021-12-15 11:18:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 11:18:26,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:26,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:26,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:18:26,559 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2021-12-15 11:18:26,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:26,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50159938] [2021-12-15 11:18:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:26,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:26,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50159938] [2021-12-15 11:18:26,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50159938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:26,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:26,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:26,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924137442] [2021-12-15 11:18:26,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:26,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:26,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:26,593 INFO L87 Difference]: Start difference. First operand 1612 states and 2603 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:26,666 INFO L93 Difference]: Finished difference Result 4676 states and 7610 transitions. [2021-12-15 11:18:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-15 11:18:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:26,676 INFO L225 Difference]: With dead ends: 4676 [2021-12-15 11:18:26,676 INFO L226 Difference]: Without dead ends: 3124 [2021-12-15 11:18:26,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:26,680 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 411 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:26,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 724 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-12-15 11:18:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 2356. [2021-12-15 11:18:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 1.6148619957537156) internal successors, (3803), 2355 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3803 transitions. [2021-12-15 11:18:26,753 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3803 transitions. Word has length 74 [2021-12-15 11:18:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:26,753 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 3803 transitions. [2021-12-15 11:18:26,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3803 transitions. [2021-12-15 11:18:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 11:18:26,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:26,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:26,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:18:26,758 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2021-12-15 11:18:26,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:26,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375496361] [2021-12-15 11:18:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:26,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:26,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:26,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375496361] [2021-12-15 11:18:26,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375496361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:26,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:26,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:26,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667918972] [2021-12-15 11:18:26,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:26,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:26,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:26,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:26,820 INFO L87 Difference]: Start difference. First operand 2356 states and 3803 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:26,910 INFO L93 Difference]: Finished difference Result 6796 states and 11038 transitions. [2021-12-15 11:18:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:26,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-12-15 11:18:26,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:26,924 INFO L225 Difference]: With dead ends: 6796 [2021-12-15 11:18:26,924 INFO L226 Difference]: Without dead ends: 4500 [2021-12-15 11:18:26,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:26,929 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 409 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:26,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 733 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2021-12-15 11:18:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 3412. [2021-12-15 11:18:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 1.612723541483436) internal successors, (5501), 3411 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 5501 transitions. [2021-12-15 11:18:27,043 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 5501 transitions. Word has length 75 [2021-12-15 11:18:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:27,044 INFO L470 AbstractCegarLoop]: Abstraction has 3412 states and 5501 transitions. [2021-12-15 11:18:27,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 5501 transitions. [2021-12-15 11:18:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:18:27,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:27,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:27,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:18:27,046 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2021-12-15 11:18:27,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:27,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784140855] [2021-12-15 11:18:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:27,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:27,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784140855] [2021-12-15 11:18:27,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784140855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:27,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:27,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:27,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413427544] [2021-12-15 11:18:27,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:27,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:27,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:27,072 INFO L87 Difference]: Start difference. First operand 3412 states and 5501 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:27,148 INFO L93 Difference]: Finished difference Result 7762 states and 12522 transitions. [2021-12-15 11:18:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 11:18:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:27,165 INFO L225 Difference]: With dead ends: 7762 [2021-12-15 11:18:27,165 INFO L226 Difference]: Without dead ends: 5340 [2021-12-15 11:18:27,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:27,171 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 110 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:27,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-12-15 11:18:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5338. [2021-12-15 11:18:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 1.6001498969458496) internal successors, (8540), 5337 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 8540 transitions. [2021-12-15 11:18:27,342 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 8540 transitions. Word has length 76 [2021-12-15 11:18:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:27,343 INFO L470 AbstractCegarLoop]: Abstraction has 5338 states and 8540 transitions. [2021-12-15 11:18:27,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 8540 transitions. [2021-12-15 11:18:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:18:27,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:27,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:27,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:18:27,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2021-12-15 11:18:27,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:27,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209562105] [2021-12-15 11:18:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:27,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:27,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:27,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209562105] [2021-12-15 11:18:27,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209562105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:27,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:27,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428336243] [2021-12-15 11:18:27,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:27,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:27,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:27,379 INFO L87 Difference]: Start difference. First operand 5338 states and 8540 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:27,491 INFO L93 Difference]: Finished difference Result 11658 states and 18702 transitions. [2021-12-15 11:18:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 11:18:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:27,525 INFO L225 Difference]: With dead ends: 11658 [2021-12-15 11:18:27,525 INFO L226 Difference]: Without dead ends: 7904 [2021-12-15 11:18:27,533 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 [2021-12-15 11:18:27,534 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 116 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:27,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-12-15 11:18:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7902. [2021-12-15 11:18:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7902 states, 7901 states have (on average 1.5919503860270852) internal successors, (12578), 7901 states have internal predecessors, (12578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7902 states to 7902 states and 12578 transitions. [2021-12-15 11:18:27,758 INFO L78 Accepts]: Start accepts. Automaton has 7902 states and 12578 transitions. Word has length 76 [2021-12-15 11:18:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:27,758 INFO L470 AbstractCegarLoop]: Abstraction has 7902 states and 12578 transitions. [2021-12-15 11:18:27,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7902 states and 12578 transitions. [2021-12-15 11:18:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:18:27,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:27,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:27,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:18:27,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash -116701437, now seen corresponding path program 1 times [2021-12-15 11:18:27,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:27,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687406729] [2021-12-15 11:18:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:27,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:27,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687406729] [2021-12-15 11:18:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687406729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:27,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:27,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437361236] [2021-12-15 11:18:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:27,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:27,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:27,791 INFO L87 Difference]: Start difference. First operand 7902 states and 12578 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:27,978 INFO L93 Difference]: Finished difference Result 17511 states and 28108 transitions. [2021-12-15 11:18:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:27,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 11:18:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:28,002 INFO L225 Difference]: With dead ends: 17511 [2021-12-15 11:18:28,002 INFO L226 Difference]: Without dead ends: 11763 [2021-12-15 11:18:28,012 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 [2021-12-15 11:18:28,012 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 122 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:28,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 503 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11763 states. [2021-12-15 11:18:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11763 to 11761. [2021-12-15 11:18:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 11760 states have (on average 1.5872448979591838) internal successors, (18666), 11760 states have internal predecessors, (18666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 18666 transitions. [2021-12-15 11:18:28,312 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 18666 transitions. Word has length 76 [2021-12-15 11:18:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:28,313 INFO L470 AbstractCegarLoop]: Abstraction has 11761 states and 18666 transitions. [2021-12-15 11:18:28,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 18666 transitions. [2021-12-15 11:18:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 11:18:28,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:28,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:28,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:18:28,314 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:28,315 INFO L85 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2021-12-15 11:18:28,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:28,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155715068] [2021-12-15 11:18:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:28,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:28,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:28,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155715068] [2021-12-15 11:18:28,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155715068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:28,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:28,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:28,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905088694] [2021-12-15 11:18:28,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:28,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:28,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:28,467 INFO L87 Difference]: Start difference. First operand 11761 states and 18666 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:28,752 INFO L93 Difference]: Finished difference Result 23438 states and 37217 transitions. [2021-12-15 11:18:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:28,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 11:18:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:28,775 INFO L225 Difference]: With dead ends: 23438 [2021-12-15 11:18:28,775 INFO L226 Difference]: Without dead ends: 11763 [2021-12-15 11:18:28,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:28,793 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 301 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:28,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 592 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11763 states. [2021-12-15 11:18:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11763 to 11761. [2021-12-15 11:18:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 11760 states have (on average 1.5766156462585035) internal successors, (18541), 11760 states have internal predecessors, (18541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 18541 transitions. [2021-12-15 11:18:29,129 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 18541 transitions. Word has length 77 [2021-12-15 11:18:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:29,129 INFO L470 AbstractCegarLoop]: Abstraction has 11761 states and 18541 transitions. [2021-12-15 11:18:29,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 18541 transitions. [2021-12-15 11:18:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 11:18:29,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:29,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:29,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:18:29,131 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 224831213, now seen corresponding path program 1 times [2021-12-15 11:18:29,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290187026] [2021-12-15 11:18:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:29,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:29,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290187026] [2021-12-15 11:18:29,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290187026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:29,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:29,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:29,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462918068] [2021-12-15 11:18:29,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:29,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:29,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:29,194 INFO L87 Difference]: Start difference. First operand 11761 states and 18541 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:29,603 INFO L93 Difference]: Finished difference Result 33682 states and 53251 transitions. [2021-12-15 11:18:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:29,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 11:18:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:29,649 INFO L225 Difference]: With dead ends: 33682 [2021-12-15 11:18:29,649 INFO L226 Difference]: Without dead ends: 22007 [2021-12-15 11:18:29,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:29,666 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 187 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:29,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 786 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22007 states. [2021-12-15 11:18:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22007 to 22005. [2021-12-15 11:18:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22005 states, 22004 states have (on average 1.5649881839665516) internal successors, (34436), 22004 states have internal predecessors, (34436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22005 states to 22005 states and 34436 transitions. [2021-12-15 11:18:30,162 INFO L78 Accepts]: Start accepts. Automaton has 22005 states and 34436 transitions. Word has length 80 [2021-12-15 11:18:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:30,162 INFO L470 AbstractCegarLoop]: Abstraction has 22005 states and 34436 transitions. [2021-12-15 11:18:30,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22005 states and 34436 transitions. [2021-12-15 11:18:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 11:18:30,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:30,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:30,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:18:30,163 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2048742578, now seen corresponding path program 1 times [2021-12-15 11:18:30,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183650358] [2021-12-15 11:18:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:30,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:30,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183650358] [2021-12-15 11:18:30,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183650358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:30,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:30,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:18:30,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303510675] [2021-12-15 11:18:30,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:30,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:18:30,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:18:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:30,240 INFO L87 Difference]: Start difference. First operand 22005 states and 34436 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:31,221 INFO L93 Difference]: Finished difference Result 42912 states and 66453 transitions. [2021-12-15 11:18:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:18:31,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-15 11:18:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:31,320 INFO L225 Difference]: With dead ends: 42912 [2021-12-15 11:18:31,320 INFO L226 Difference]: Without dead ends: 42910 [2021-12-15 11:18:31,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:18:31,334 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1016 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:31,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42910 states. [2021-12-15 11:18:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42910 to 23091. [2021-12-15 11:18:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23091 states, 23090 states have (on average 1.5380251190991772) internal successors, (35513), 23090 states have internal predecessors, (35513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23091 states to 23091 states and 35513 transitions. [2021-12-15 11:18:32,082 INFO L78 Accepts]: Start accepts. Automaton has 23091 states and 35513 transitions. Word has length 81 [2021-12-15 11:18:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:32,083 INFO L470 AbstractCegarLoop]: Abstraction has 23091 states and 35513 transitions. [2021-12-15 11:18:32,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23091 states and 35513 transitions. [2021-12-15 11:18:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:18:32,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:32,085 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:18:32,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:18:32,085 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash -601727771, now seen corresponding path program 1 times [2021-12-15 11:18:32,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:32,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786427018] [2021-12-15 11:18:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:32,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 11:18:32,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786427018] [2021-12-15 11:18:32,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786427018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:32,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:32,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:32,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345022525] [2021-12-15 11:18:32,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:32,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:32,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:32,133 INFO L87 Difference]: Start difference. First operand 23091 states and 35513 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:33,008 INFO L93 Difference]: Finished difference Result 56431 states and 87041 transitions. [2021-12-15 11:18:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 109 [2021-12-15 11:18:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:33,105 INFO L225 Difference]: With dead ends: 56431 [2021-12-15 11:18:33,106 INFO L226 Difference]: Without dead ends: 45489 [2021-12-15 11:18:33,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:33,132 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 525 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:33,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 922 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45489 states. [2021-12-15 11:18:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45489 to 35483. [2021-12-15 11:18:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35483 states, 35482 states have (on average 1.536525562256919) internal successors, (54519), 35482 states have internal predecessors, (54519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35483 states to 35483 states and 54519 transitions. [2021-12-15 11:18:34,410 INFO L78 Accepts]: Start accepts. Automaton has 35483 states and 54519 transitions. Word has length 109 [2021-12-15 11:18:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:34,410 INFO L470 AbstractCegarLoop]: Abstraction has 35483 states and 54519 transitions. [2021-12-15 11:18:34,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 35483 states and 54519 transitions. [2021-12-15 11:18:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:18:34,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:34,413 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:18:34,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:18:34,413 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1835455643, now seen corresponding path program 1 times [2021-12-15 11:18:34,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:34,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403423582] [2021-12-15 11:18:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:34,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:18:34,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403423582] [2021-12-15 11:18:34,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403423582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:34,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:34,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:34,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529457052] [2021-12-15 11:18:34,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:34,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:34,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:34,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:34,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:34,472 INFO L87 Difference]: Start difference. First operand 35483 states and 54519 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:35,576 INFO L93 Difference]: Finished difference Result 60807 states and 93801 transitions. [2021-12-15 11:18:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:35,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-15 11:18:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:35,727 INFO L225 Difference]: With dead ends: 60807 [2021-12-15 11:18:35,728 INFO L226 Difference]: Without dead ends: 49865 [2021-12-15 11:18:35,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:35,756 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 522 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:35,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 987 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49865 states. [2021-12-15 11:18:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49865 to 48067. [2021-12-15 11:18:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48067 states, 48066 states have (on average 1.5370324137644074) internal successors, (73879), 48066 states have internal predecessors, (73879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48067 states to 48067 states and 73879 transitions. [2021-12-15 11:18:37,233 INFO L78 Accepts]: Start accepts. Automaton has 48067 states and 73879 transitions. Word has length 109 [2021-12-15 11:18:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 48067 states and 73879 transitions. [2021-12-15 11:18:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 48067 states and 73879 transitions. [2021-12-15 11:18:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:18:37,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:37,236 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:18:37,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:18:37,237 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1633761629, now seen corresponding path program 1 times [2021-12-15 11:18:37,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:37,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406506997] [2021-12-15 11:18:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:37,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:18:37,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:37,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406506997] [2021-12-15 11:18:37,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406506997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:37,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:37,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:37,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750767295] [2021-12-15 11:18:37,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:37,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:37,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:37,269 INFO L87 Difference]: Start difference. First operand 48067 states and 73879 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:39,181 INFO L93 Difference]: Finished difference Result 100238 states and 154694 transitions. [2021-12-15 11:18:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 109 [2021-12-15 11:18:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:39,367 INFO L225 Difference]: With dead ends: 100238 [2021-12-15 11:18:39,368 INFO L226 Difference]: Without dead ends: 89036 [2021-12-15 11:18:39,408 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 [2021-12-15 11:18:39,409 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 99 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:39,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 405 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89036 states. [2021-12-15 11:18:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89036 to 88919. [2021-12-15 11:18:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88919 states, 88918 states have (on average 1.5396994984142693) internal successors, (136907), 88918 states have internal predecessors, (136907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88919 states to 88919 states and 136907 transitions. [2021-12-15 11:18:41,992 INFO L78 Accepts]: Start accepts. Automaton has 88919 states and 136907 transitions. Word has length 109 [2021-12-15 11:18:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:41,992 INFO L470 AbstractCegarLoop]: Abstraction has 88919 states and 136907 transitions. [2021-12-15 11:18:41,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 88919 states and 136907 transitions. [2021-12-15 11:18:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 11:18:41,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:41,995 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:18:41,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:18:41,995 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1592792316, now seen corresponding path program 1 times [2021-12-15 11:18:41,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:41,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063663999] [2021-12-15 11:18:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:41,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:42,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063663999] [2021-12-15 11:18:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063663999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:42,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:42,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708286023] [2021-12-15 11:18:42,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:42,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:42,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:42,026 INFO L87 Difference]: Start difference. First operand 88919 states and 136907 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:46,138 INFO L93 Difference]: Finished difference Result 263175 states and 404531 transitions. [2021-12-15 11:18:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-15 11:18:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:46,662 INFO L225 Difference]: With dead ends: 263175 [2021-12-15 11:18:46,662 INFO L226 Difference]: Without dead ends: 174332 [2021-12-15 11:18:46,748 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 [2021-12-15 11:18:46,749 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 147 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:46,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 494 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174332 states. [2021-12-15 11:18:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174332 to 174330. [2021-12-15 11:18:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174330 states, 174329 states have (on average 1.5262692954126966) internal successors, (266073), 174329 states have internal predecessors, (266073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174330 states to 174330 states and 266073 transitions. [2021-12-15 11:18:52,124 INFO L78 Accepts]: Start accepts. Automaton has 174330 states and 266073 transitions. Word has length 110 [2021-12-15 11:18:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:52,124 INFO L470 AbstractCegarLoop]: Abstraction has 174330 states and 266073 transitions. [2021-12-15 11:18:52,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 174330 states and 266073 transitions. [2021-12-15 11:18:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 11:18:52,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:52,128 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:18:52,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:18:52,129 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1452537340, now seen corresponding path program 1 times [2021-12-15 11:18:52,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339179694] [2021-12-15 11:18:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:52,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:18:52,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:52,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339179694] [2021-12-15 11:18:52,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339179694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:52,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:52,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25844845] [2021-12-15 11:18:52,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:52,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:52,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:52,195 INFO L87 Difference]: Start difference. First operand 174330 states and 266073 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:56,686 INFO L93 Difference]: Finished difference Result 282522 states and 432644 transitions. [2021-12-15 11:18:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 110 [2021-12-15 11:18:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:57,078 INFO L225 Difference]: With dead ends: 282522 [2021-12-15 11:18:57,079 INFO L226 Difference]: Without dead ends: 181778 [2021-12-15 11:18:57,160 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 [2021-12-15 11:18:57,162 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 224 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:57,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 748 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181778 states.