./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:07:06,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:07:06,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:07:06,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:07:06,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:07:06,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:07:06,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:07:06,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:07:06,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:07:06,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:07:06,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:07:06,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:07:06,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:07:06,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:07:06,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:07:06,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:07:06,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:07:06,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:07:06,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:07:06,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:07:06,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:07:06,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:07:06,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:07:06,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:07:06,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:07:06,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:07:06,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:07:06,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:07:06,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:07:06,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:07:06,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:07:06,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:07:06,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:07:06,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:07:06,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:07:06,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:07:06,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:07:06,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:07:06,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:07:06,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:07:06,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:07:06,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:07:06,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:07:06,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:07:06,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:07:06,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:07:06,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:07:06,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:07:06,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:07:06,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:07:06,658 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:07:06,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:07:06,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:07:06,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:07:06,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:07:06,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:07:06,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:07:06,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:07:06,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:07:06,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:07:06,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:07:06,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:07:06,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:07:06,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:07:06,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:07:06,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:07:06,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:07:06,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:07:06,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:07:06,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:07:06,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:07:06,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:07:06,665 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:07:06,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:07:06,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:07:06,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:07:06,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab [2021-12-14 15:07:06,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:07:06,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:07:06,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:07:06,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:07:06,929 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:07:06,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-14 15:07:06,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7427fbcd/2d9fc06b087f4792865ce4e5687191a0/FLAG6ac00c231 [2021-12-14 15:07:07,428 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:07:07,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-14 15:07:07,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7427fbcd/2d9fc06b087f4792865ce4e5687191a0/FLAG6ac00c231 [2021-12-14 15:07:07,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7427fbcd/2d9fc06b087f4792865ce4e5687191a0 [2021-12-14 15:07:07,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:07:07,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:07:07,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:07:07,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:07:07,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:07:07,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:07:07" (1/1) ... [2021-12-14 15:07:07,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455250ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:07, skipping insertion in model container [2021-12-14 15:07:07,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:07:07" (1/1) ... [2021-12-14 15:07:07,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:07:08,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:07:08,227 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-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2021-12-14 15:07:08,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:07:08,266 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:07:08,304 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-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2021-12-14 15:07:08,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:07:08,340 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:07:08,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08 WrapperNode [2021-12-14 15:07:08,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:07:08,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:07:08,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:07:08,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:07:08,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,398 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 570 [2021-12-14 15:07:08,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:07:08,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:07:08,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:07:08,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:07:08,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:07:08,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:07:08,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:07:08,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:07:08,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (1/1) ... [2021-12-14 15:07:08,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:07:08,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:07:08,503 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) [2021-12-14 15:07:08,516 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 [2021-12-14 15:07:08,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:07:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:07:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:07:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:07:08,703 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:07:08,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:07:09,250 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:07:09,261 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:07:09,262 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:07:09,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:07:09 BoogieIcfgContainer [2021-12-14 15:07:09,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:07:09,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:07:09,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:07:09,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:07:09,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:07:07" (1/3) ... [2021-12-14 15:07:09,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dacf554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:07:09, skipping insertion in model container [2021-12-14 15:07:09,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:08" (2/3) ... [2021-12-14 15:07:09,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dacf554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:07:09, skipping insertion in model container [2021-12-14 15:07:09,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:07:09" (3/3) ... [2021-12-14 15:07:09,274 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-14 15:07:09,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:07:09,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:07:09,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:07:09,348 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 [2021-12-14 15:07:09,349 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:07:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.763779527559055) internal successors, (224), 128 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 15:07:09,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:09,389 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] [2021-12-14 15:07:09,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash 794226412, now seen corresponding path program 1 times [2021-12-14 15:07:09,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:09,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892030701] [2021-12-14 15:07:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:09,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:09,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892030701] [2021-12-14 15:07:09,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892030701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:09,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:09,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:09,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40506299] [2021-12-14 15:07:09,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:09,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:09,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:09,766 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.763779527559055) internal successors, (224), 128 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:09,873 INFO L93 Difference]: Finished difference Result 282 states and 479 transitions. [2021-12-14 15:07:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:09,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-14 15:07:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:09,891 INFO L225 Difference]: With dead ends: 282 [2021-12-14 15:07:09,891 INFO L226 Difference]: Without dead ends: 195 [2021-12-14 15:07:09,899 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 [2021-12-14 15:07:09,903 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 125 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:09,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 400 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-14 15:07:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-12-14 15:07:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.5989583333333333) internal successors, (307), 192 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 307 transitions. [2021-12-14 15:07:09,969 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 307 transitions. Word has length 51 [2021-12-14 15:07:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:09,969 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 307 transitions. [2021-12-14 15:07:09,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 307 transitions. [2021-12-14 15:07:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 15:07:09,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:09,975 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] [2021-12-14 15:07:09,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:07:09,976 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash -797280551, now seen corresponding path program 1 times [2021-12-14 15:07:09,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:09,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630883878] [2021-12-14 15:07:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:09,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:10,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630883878] [2021-12-14 15:07:10,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630883878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:10,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:10,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:10,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998909121] [2021-12-14 15:07:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:10,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:10,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:10,078 INFO L87 Difference]: Start difference. First operand 193 states and 307 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:10,115 INFO L93 Difference]: Finished difference Result 469 states and 763 transitions. [2021-12-14 15:07:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:10,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-14 15:07:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:10,122 INFO L225 Difference]: With dead ends: 469 [2021-12-14 15:07:10,123 INFO L226 Difference]: Without dead ends: 324 [2021-12-14 15:07:10,124 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 [2021-12-14 15:07:10,125 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 110 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:10,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 436 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-14 15:07:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2021-12-14 15:07:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.6168224299065421) internal successors, (519), 321 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 519 transitions. [2021-12-14 15:07:10,149 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 519 transitions. Word has length 53 [2021-12-14 15:07:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:10,150 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 519 transitions. [2021-12-14 15:07:10,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 519 transitions. [2021-12-14 15:07:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 15:07:10,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:10,161 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] [2021-12-14 15:07:10,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:07:10,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 59105759, now seen corresponding path program 1 times [2021-12-14 15:07:10,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:10,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513287613] [2021-12-14 15:07:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:10,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:10,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513287613] [2021-12-14 15:07:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513287613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:10,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:10,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:10,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940026993] [2021-12-14 15:07:10,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:10,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:10,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:10,253 INFO L87 Difference]: Start difference. First operand 322 states and 519 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:10,284 INFO L93 Difference]: Finished difference Result 597 states and 975 transitions. [2021-12-14 15:07:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:10,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 15:07:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:10,302 INFO L225 Difference]: With dead ends: 597 [2021-12-14 15:07:10,303 INFO L226 Difference]: Without dead ends: 452 [2021-12-14 15:07:10,304 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 [2021-12-14 15:07:10,305 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 111 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 432 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 [2021-12-14 15:07:10,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 432 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-12-14 15:07:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-12-14 15:07:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.623608017817372) internal successors, (729), 449 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 729 transitions. [2021-12-14 15:07:10,353 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 729 transitions. Word has length 55 [2021-12-14 15:07:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:10,354 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 729 transitions. [2021-12-14 15:07:10,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 729 transitions. [2021-12-14 15:07:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 15:07:10,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:10,356 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] [2021-12-14 15:07:10,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:07:10,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1104417908, now seen corresponding path program 1 times [2021-12-14 15:07:10,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:10,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81267849] [2021-12-14 15:07:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:10,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:10,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:10,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81267849] [2021-12-14 15:07:10,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81267849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:10,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:10,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:10,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836857862] [2021-12-14 15:07:10,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:10,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:10,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:10,419 INFO L87 Difference]: Start difference. First operand 450 states and 729 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:10,457 INFO L93 Difference]: Finished difference Result 1166 states and 1905 transitions. [2021-12-14 15:07:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 15:07:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:10,462 INFO L225 Difference]: With dead ends: 1166 [2021-12-14 15:07:10,462 INFO L226 Difference]: Without dead ends: 787 [2021-12-14 15:07:10,464 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 [2021-12-14 15:07:10,465 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 105 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:10,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 374 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-14 15:07:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 785. [2021-12-14 15:07:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.621173469387755) internal successors, (1271), 784 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1271 transitions. [2021-12-14 15:07:10,499 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1271 transitions. Word has length 55 [2021-12-14 15:07:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:10,500 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1271 transitions. [2021-12-14 15:07:10,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1271 transitions. [2021-12-14 15:07:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 15:07:10,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:10,502 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] [2021-12-14 15:07:10,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:07:10,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash -179259079, now seen corresponding path program 1 times [2021-12-14 15:07:10,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:10,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394516424] [2021-12-14 15:07:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:10,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:10,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394516424] [2021-12-14 15:07:10,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394516424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:10,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:10,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:10,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358809815] [2021-12-14 15:07:10,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:10,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:10,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:10,597 INFO L87 Difference]: Start difference. First operand 785 states and 1271 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:10,835 INFO L93 Difference]: Finished difference Result 3562 states and 5882 transitions. [2021-12-14 15:07:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:07:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-14 15:07:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:10,852 INFO L225 Difference]: With dead ends: 3562 [2021-12-14 15:07:10,852 INFO L226 Difference]: Without dead ends: 2848 [2021-12-14 15:07:10,856 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 [2021-12-14 15:07:10,859 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 883 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:10,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 1235 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:07:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-12-14 15:07:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1426. [2021-12-14 15:07:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 1.6259649122807018) internal successors, (2317), 1425 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 2317 transitions. [2021-12-14 15:07:10,980 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 2317 transitions. Word has length 57 [2021-12-14 15:07:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:10,981 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 2317 transitions. [2021-12-14 15:07:10,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 2317 transitions. [2021-12-14 15:07:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 15:07:10,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:10,987 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] [2021-12-14 15:07:10,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:07:10,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1324568371, now seen corresponding path program 1 times [2021-12-14 15:07:10,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:10,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122910478] [2021-12-14 15:07:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:10,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:11,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122910478] [2021-12-14 15:07:11,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122910478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:11,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:11,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:11,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182379405] [2021-12-14 15:07:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:11,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:11,086 INFO L87 Difference]: Start difference. First operand 1426 states and 2317 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:11,261 INFO L93 Difference]: Finished difference Result 4193 states and 6904 transitions. [2021-12-14 15:07:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:07:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-14 15:07:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:11,277 INFO L225 Difference]: With dead ends: 4193 [2021-12-14 15:07:11,278 INFO L226 Difference]: Without dead ends: 2840 [2021-12-14 15:07:11,282 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 [2021-12-14 15:07:11,285 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 379 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:11,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 589 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-12-14 15:07:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2121. [2021-12-14 15:07:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 1.6320754716981132) internal successors, (3460), 2120 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3460 transitions. [2021-12-14 15:07:11,423 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3460 transitions. Word has length 58 [2021-12-14 15:07:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:11,424 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 3460 transitions. [2021-12-14 15:07:11,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3460 transitions. [2021-12-14 15:07:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 15:07:11,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:11,427 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] [2021-12-14 15:07:11,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:07:11,428 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:11,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1037107898, now seen corresponding path program 1 times [2021-12-14 15:07:11,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362298665] [2021-12-14 15:07:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:11,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362298665] [2021-12-14 15:07:11,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362298665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:11,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:11,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:11,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942903785] [2021-12-14 15:07:11,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:11,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:11,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:11,473 INFO L87 Difference]: Start difference. First operand 2121 states and 3460 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:11,634 INFO L93 Difference]: Finished difference Result 4115 states and 6746 transitions. [2021-12-14 15:07:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-14 15:07:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:11,647 INFO L225 Difference]: With dead ends: 4115 [2021-12-14 15:07:11,648 INFO L226 Difference]: Without dead ends: 2973 [2021-12-14 15:07:11,651 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 [2021-12-14 15:07:11,652 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 106 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 414 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 [2021-12-14 15:07:11,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 414 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-12-14 15:07:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2971. [2021-12-14 15:07:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 1.626936026936027) internal successors, (4832), 2970 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4832 transitions. [2021-12-14 15:07:11,831 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4832 transitions. Word has length 58 [2021-12-14 15:07:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:11,832 INFO L470 AbstractCegarLoop]: Abstraction has 2971 states and 4832 transitions. [2021-12-14 15:07:11,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4832 transitions. [2021-12-14 15:07:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 15:07:11,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:11,833 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] [2021-12-14 15:07:11,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:07:11,834 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash 405262074, now seen corresponding path program 1 times [2021-12-14 15:07:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677170686] [2021-12-14 15:07:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:11,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:11,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677170686] [2021-12-14 15:07:11,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677170686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:11,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:11,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:11,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264399777] [2021-12-14 15:07:11,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:11,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:11,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:11,875 INFO L87 Difference]: Start difference. First operand 2971 states and 4832 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:12,114 INFO L93 Difference]: Finished difference Result 6393 states and 10544 transitions. [2021-12-14 15:07:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-14 15:07:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:12,135 INFO L225 Difference]: With dead ends: 6393 [2021-12-14 15:07:12,135 INFO L226 Difference]: Without dead ends: 4307 [2021-12-14 15:07:12,141 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 [2021-12-14 15:07:12,142 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 116 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 455 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 [2021-12-14 15:07:12,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 455 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2021-12-14 15:07:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 4305. [2021-12-14 15:07:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 1.634061338289963) internal successors, (7033), 4304 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 7033 transitions. [2021-12-14 15:07:12,431 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 7033 transitions. Word has length 58 [2021-12-14 15:07:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:12,431 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 7033 transitions. [2021-12-14 15:07:12,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 7033 transitions. [2021-12-14 15:07:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 15:07:12,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:12,433 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] [2021-12-14 15:07:12,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:07:12,435 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1830107264, now seen corresponding path program 1 times [2021-12-14 15:07:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:12,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330222275] [2021-12-14 15:07:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:12,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:12,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330222275] [2021-12-14 15:07:12,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330222275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:12,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:12,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756332976] [2021-12-14 15:07:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:12,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:12,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:12,498 INFO L87 Difference]: Start difference. First operand 4305 states and 7033 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:13,022 INFO L93 Difference]: Finished difference Result 13696 states and 22476 transitions. [2021-12-14 15:07:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:07:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-14 15:07:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:13,063 INFO L225 Difference]: With dead ends: 13696 [2021-12-14 15:07:13,064 INFO L226 Difference]: Without dead ends: 9467 [2021-12-14 15:07:13,072 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 [2021-12-14 15:07:13,073 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 377 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 663 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 [2021-12-14 15:07:13,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 663 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9467 states. [2021-12-14 15:07:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9467 to 6857. [2021-12-14 15:07:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6857 states, 6856 states have (on average 1.6270420070011669) internal successors, (11155), 6856 states have internal predecessors, (11155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6857 states to 6857 states and 11155 transitions. [2021-12-14 15:07:13,485 INFO L78 Accepts]: Start accepts. Automaton has 6857 states and 11155 transitions. Word has length 59 [2021-12-14 15:07:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:13,485 INFO L470 AbstractCegarLoop]: Abstraction has 6857 states and 11155 transitions. [2021-12-14 15:07:13,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 6857 states and 11155 transitions. [2021-12-14 15:07:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 15:07:13,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:13,486 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] [2021-12-14 15:07:13,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:07:13,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 845362164, now seen corresponding path program 1 times [2021-12-14 15:07:13,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:13,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675696074] [2021-12-14 15:07:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:13,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:13,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:13,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675696074] [2021-12-14 15:07:13,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675696074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:13,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:13,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:13,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929196191] [2021-12-14 15:07:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:13,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:13,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:13,539 INFO L87 Difference]: Start difference. First operand 6857 states and 11155 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:14,348 INFO L93 Difference]: Finished difference Result 21428 states and 34988 transitions. [2021-12-14 15:07:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:07:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-14 15:07:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:14,395 INFO L225 Difference]: With dead ends: 21428 [2021-12-14 15:07:14,396 INFO L226 Difference]: Without dead ends: 14647 [2021-12-14 15:07:14,413 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 [2021-12-14 15:07:14,414 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 375 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 660 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 [2021-12-14 15:07:14,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 660 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14647 states. [2021-12-14 15:07:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14647 to 10709. [2021-12-14 15:07:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 1.6194434067986552) internal successors, (17341), 10708 states have internal predecessors, (17341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 17341 transitions. [2021-12-14 15:07:15,129 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 17341 transitions. Word has length 60 [2021-12-14 15:07:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:15,129 INFO L470 AbstractCegarLoop]: Abstraction has 10709 states and 17341 transitions. [2021-12-14 15:07:15,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 17341 transitions. [2021-12-14 15:07:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:07:15,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:15,131 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] [2021-12-14 15:07:15,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:07:15,132 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash -873091579, now seen corresponding path program 1 times [2021-12-14 15:07:15,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:15,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454498612] [2021-12-14 15:07:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:15,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:15,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:15,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454498612] [2021-12-14 15:07:15,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454498612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:15,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:15,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:15,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256913300] [2021-12-14 15:07:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:15,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:15,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:15,284 INFO L87 Difference]: Start difference. First operand 10709 states and 17341 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:15,956 INFO L93 Difference]: Finished difference Result 21344 states and 34577 transitions. [2021-12-14 15:07:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-14 15:07:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:16,055 INFO L225 Difference]: With dead ends: 21344 [2021-12-14 15:07:16,055 INFO L226 Difference]: Without dead ends: 10711 [2021-12-14 15:07:16,072 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 [2021-12-14 15:07:16,074 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 373 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:16,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 534 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10711 states. [2021-12-14 15:07:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10711 to 10709. [2021-12-14 15:07:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 1.6077698916697796) internal successors, (17216), 10708 states have internal predecessors, (17216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 17216 transitions. [2021-12-14 15:07:16,784 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 17216 transitions. Word has length 62 [2021-12-14 15:07:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:16,785 INFO L470 AbstractCegarLoop]: Abstraction has 10709 states and 17216 transitions. [2021-12-14 15:07:16,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 17216 transitions. [2021-12-14 15:07:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 15:07:16,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:16,791 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] [2021-12-14 15:07:16,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:07:16,792 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1997863438, now seen corresponding path program 1 times [2021-12-14 15:07:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331263733] [2021-12-14 15:07:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:16,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:16,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331263733] [2021-12-14 15:07:16,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331263733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:16,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:16,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:16,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133373874] [2021-12-14 15:07:16,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:16,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:16,907 INFO L87 Difference]: Start difference. First operand 10709 states and 17216 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:18,040 INFO L93 Difference]: Finished difference Result 30654 states and 49431 transitions. [2021-12-14 15:07:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-14 15:07:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:18,118 INFO L225 Difference]: With dead ends: 30654 [2021-12-14 15:07:18,118 INFO L226 Difference]: Without dead ends: 20021 [2021-12-14 15:07:18,150 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 [2021-12-14 15:07:18,151 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 265 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:18,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 541 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20021 states. [2021-12-14 15:07:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20021 to 20019. [2021-12-14 15:07:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20019 states, 20018 states have (on average 1.5951143970426616) internal successors, (31931), 20018 states have internal predecessors, (31931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 31931 transitions. [2021-12-14 15:07:19,221 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 31931 transitions. Word has length 65 [2021-12-14 15:07:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:19,221 INFO L470 AbstractCegarLoop]: Abstraction has 20019 states and 31931 transitions. [2021-12-14 15:07:19,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 31931 transitions. [2021-12-14 15:07:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 15:07:19,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:19,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:19,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:07:19,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:19,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1806133758, now seen corresponding path program 1 times [2021-12-14 15:07:19,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:19,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008915209] [2021-12-14 15:07:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:19,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:19,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008915209] [2021-12-14 15:07:19,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008915209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:19,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:19,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:19,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461198569] [2021-12-14 15:07:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:19,400 INFO L87 Difference]: Start difference. First operand 20019 states and 31931 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2021-12-14 15:07:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:21,093 INFO L93 Difference]: Finished difference Result 38397 states and 60944 transitions. [2021-12-14 15:07:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:07:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 [2021-12-14 15:07:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:21,237 INFO L225 Difference]: With dead ends: 38397 [2021-12-14 15:07:21,237 INFO L226 Difference]: Without dead ends: 38395 [2021-12-14 15:07:21,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:07:21,264 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 234 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:21,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 918 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38395 states. [2021-12-14 15:07:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38395 to 20743. [2021-12-14 15:07:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20743 states, 20742 states have (on average 1.5739080127277987) internal successors, (32646), 20742 states have internal predecessors, (32646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20743 states to 20743 states and 32646 transitions. [2021-12-14 15:07:22,615 INFO L78 Accepts]: Start accepts. Automaton has 20743 states and 32646 transitions. Word has length 66 [2021-12-14 15:07:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:22,616 INFO L470 AbstractCegarLoop]: Abstraction has 20743 states and 32646 transitions. [2021-12-14 15:07:22,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2021-12-14 15:07:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20743 states and 32646 transitions. [2021-12-14 15:07:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 15:07:22,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:22,624 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:07:22,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:07:22,624 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1551322964, now seen corresponding path program 1 times [2021-12-14 15:07:22,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:22,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176102123] [2021-12-14 15:07:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:22,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 15:07:22,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176102123] [2021-12-14 15:07:22,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176102123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:22,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:22,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:22,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395279864] [2021-12-14 15:07:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:22,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:22,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:22,701 INFO L87 Difference]: Start difference. First operand 20743 states and 32646 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2021-12-14 15:07:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:24,649 INFO L93 Difference]: Finished difference Result 50551 states and 79848 transitions. [2021-12-14 15:07:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 87 [2021-12-14 15:07:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:24,776 INFO L225 Difference]: With dead ends: 50551 [2021-12-14 15:07:24,777 INFO L226 Difference]: Without dead ends: 40759 [2021-12-14 15:07:24,804 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 [2021-12-14 15:07:24,805 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 482 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:24,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 854 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:07:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40759 states. [2021-12-14 15:07:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40759 to 31829. [2021-12-14 15:07:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31829 states, 31828 states have (on average 1.5726404423777807) internal successors, (50054), 31828 states have internal predecessors, (50054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31829 states to 31829 states and 50054 transitions. [2021-12-14 15:07:26,556 INFO L78 Accepts]: Start accepts. Automaton has 31829 states and 50054 transitions. Word has length 87 [2021-12-14 15:07:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:26,557 INFO L470 AbstractCegarLoop]: Abstraction has 31829 states and 50054 transitions. [2021-12-14 15:07:26,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2021-12-14 15:07:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 31829 states and 50054 transitions. [2021-12-14 15:07:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 15:07:26,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:26,560 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:07:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:07:26,561 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash -180423953, now seen corresponding path program 1 times [2021-12-14 15:07:26,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:26,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107278820] [2021-12-14 15:07:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:26,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 15:07:26,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:26,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107278820] [2021-12-14 15:07:26,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107278820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:26,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:26,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:26,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106969532] [2021-12-14 15:07:26,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:26,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:26,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:26,629 INFO L87 Difference]: Start difference. First operand 31829 states and 50054 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2021-12-14 15:07:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:29,001 INFO L93 Difference]: Finished difference Result 54443 states and 86012 transitions. [2021-12-14 15:07:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 87 [2021-12-14 15:07:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:29,089 INFO L225 Difference]: With dead ends: 54443 [2021-12-14 15:07:29,089 INFO L226 Difference]: Without dead ends: 44651 [2021-12-14 15:07:29,119 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 [2021-12-14 15:07:29,120 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 478 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:29,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 917 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:07:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44651 states. [2021-12-14 15:07:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44651 to 43061. [2021-12-14 15:07:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43061 states, 43060 states have (on average 1.573525313516024) internal successors, (67756), 43060 states have internal predecessors, (67756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43061 states to 43061 states and 67756 transitions. [2021-12-14 15:07:31,448 INFO L78 Accepts]: Start accepts. Automaton has 43061 states and 67756 transitions. Word has length 87 [2021-12-14 15:07:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:31,449 INFO L470 AbstractCegarLoop]: Abstraction has 43061 states and 67756 transitions. [2021-12-14 15:07:31,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2021-12-14 15:07:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 43061 states and 67756 transitions. [2021-12-14 15:07:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 15:07:31,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:31,453 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:07:31,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:07:31,453 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:31,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1505007627, now seen corresponding path program 1 times [2021-12-14 15:07:31,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:31,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137523193] [2021-12-14 15:07:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:31,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:07:31,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137523193] [2021-12-14 15:07:31,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137523193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:31,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:31,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:31,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189840120] [2021-12-14 15:07:31,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:31,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:31,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:31,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:31,527 INFO L87 Difference]: Start difference. First operand 43061 states and 67756 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:34,158 INFO L93 Difference]: Finished difference Result 61057 states and 96640 transitions. [2021-12-14 15:07:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 87 [2021-12-14 15:07:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:34,271 INFO L225 Difference]: With dead ends: 61057 [2021-12-14 15:07:34,272 INFO L226 Difference]: Without dead ends: 51035 [2021-12-14 15:07:34,299 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 [2021-12-14 15:07:34,300 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 476 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:34,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 962 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:07:34,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51035 states. [2021-12-14 15:07:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51035 to 49445. [2021-12-14 15:07:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49445 states, 49444 states have (on average 1.5764096755925896) internal successors, (77944), 49444 states have internal predecessors, (77944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49445 states to 49445 states and 77944 transitions. [2021-12-14 15:07:36,832 INFO L78 Accepts]: Start accepts. Automaton has 49445 states and 77944 transitions. Word has length 87 [2021-12-14 15:07:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:36,832 INFO L470 AbstractCegarLoop]: Abstraction has 49445 states and 77944 transitions. [2021-12-14 15:07:36,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49445 states and 77944 transitions. [2021-12-14 15:07:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 15:07:36,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:36,836 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:07:36,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:07:36,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1452800423, now seen corresponding path program 1 times [2021-12-14 15:07:36,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:36,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078619022] [2021-12-14 15:07:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:36,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:36,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:36,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078619022] [2021-12-14 15:07:36,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078619022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:36,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:36,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:36,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654321915] [2021-12-14 15:07:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:36,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:36,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:36,893 INFO L87 Difference]: Start difference. First operand 49445 states and 77944 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:39,430 INFO L93 Difference]: Finished difference Result 92374 states and 146093 transitions. [2021-12-14 15:07:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-14 15:07:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:39,504 INFO L225 Difference]: With dead ends: 92374 [2021-12-14 15:07:39,505 INFO L226 Difference]: Without dead ends: 43005 [2021-12-14 15:07:39,547 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 [2021-12-14 15:07:39,548 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 87 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:39,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 421 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43005 states. [2021-12-14 15:07:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43005 to 42999. [2021-12-14 15:07:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42999 states, 42998 states have (on average 1.5772361505186288) internal successors, (67818), 42998 states have internal predecessors, (67818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42999 states to 42999 states and 67818 transitions. [2021-12-14 15:07:41,934 INFO L78 Accepts]: Start accepts. Automaton has 42999 states and 67818 transitions. Word has length 88 [2021-12-14 15:07:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:41,934 INFO L470 AbstractCegarLoop]: Abstraction has 42999 states and 67818 transitions. [2021-12-14 15:07:41,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42999 states and 67818 transitions. [2021-12-14 15:07:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 15:07:41,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:41,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:41,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:07:41,937 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1846294304, now seen corresponding path program 1 times [2021-12-14 15:07:41,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:41,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507867373] [2021-12-14 15:07:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:41,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 15:07:42,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507867373] [2021-12-14 15:07:42,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507867373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:42,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:42,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:07:42,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910934638] [2021-12-14 15:07:42,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:42,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:07:42,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:07:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:07:42,436 INFO L87 Difference]: Start difference. First operand 42999 states and 67818 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:46,883 INFO L93 Difference]: Finished difference Result 102013 states and 161787 transitions. [2021-12-14 15:07:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 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 88 [2021-12-14 15:07:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:47,059 INFO L225 Difference]: With dead ends: 102013 [2021-12-14 15:07:47,059 INFO L226 Difference]: Without dead ends: 77431 [2021-12-14 15:07:47,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:07:47,103 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 496 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:47,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 870 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77431 states.