./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label09.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 759500fc885fd8551afb1744440c02e812929b084934756d49ccfd6e6b033437 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:03:19,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:03:19,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:03:19,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:03:19,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:03:19,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:03:19,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:03:19,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:03:19,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:03:19,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:03:19,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:03:19,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:03:19,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:03:19,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:03:19,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:03:19,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:03:19,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:03:19,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:03:19,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:03:19,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:03:19,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:03:19,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:03:19,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:03:19,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:03:19,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:03:19,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:03:19,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:03:19,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:03:19,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:03:19,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:03:19,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:03:19,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:03:19,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:03:19,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:03:19,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:03:19,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:03:19,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:03:19,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:03:19,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:03:19,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:03:19,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:03:19,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:03:19,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:03:19,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:03:19,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:03:19,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:03:19,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:03:19,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:03:19,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:03:19,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:03:19,524 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:03:19,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:03:19,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:03:19,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:03:19,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:03:19,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:03:19,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:03:19,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:03:19,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:03:19,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:03:19,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:03:19,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:03:19,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:03:19,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:03:19,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:03:19,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:03:19,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:03:19,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:03:19,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:03:19,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:03:19,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:03:19,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:03:19,528 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:03:19,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:03:19,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:03:19,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:03:19,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 759500fc885fd8551afb1744440c02e812929b084934756d49ccfd6e6b033437 [2021-12-15 09:03:19,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:03:19,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:03:19,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:03:19,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:03:19,749 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:03:19,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label09.c [2021-12-15 09:03:19,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1424c49b6/7bcdf034c47c4f51a6fffd80beb13eae/FLAG13f131fe9 [2021-12-15 09:03:20,258 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:03:20,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label09.c [2021-12-15 09:03:20,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1424c49b6/7bcdf034c47c4f51a6fffd80beb13eae/FLAG13f131fe9 [2021-12-15 09:03:20,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1424c49b6/7bcdf034c47c4f51a6fffd80beb13eae [2021-12-15 09:03:20,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:03:20,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:03:20,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:03:20,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:03:20,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:03:20,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:03:20" (1/1) ... [2021-12-15 09:03:20,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c31a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:20, skipping insertion in model container [2021-12-15 09:03:20,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:03:20" (1/1) ... [2021-12-15 09:03:20,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:03:20,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:03:21,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label09.c[54191,54204] [2021-12-15 09:03:21,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:03:21,074 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:03:21,222 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label09.c[54191,54204] [2021-12-15 09:03:21,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:03:21,251 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:03:21,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21 WrapperNode [2021-12-15 09:03:21,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:03:21,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:03:21,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:03:21,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:03:21,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,357 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:03:21,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:03:21,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:03:21,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:03:21,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:03:21,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:03:21,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:03:21,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:03:21,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:03:21,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (1/1) ... [2021-12-15 09:03:21,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:03:21,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:21,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:03:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:03:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:03:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:03:21,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:03:21,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:03:21,637 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:03:21,639 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:03:22,688 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:03:22,702 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:03:22,703 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:03:22,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:03:22 BoogieIcfgContainer [2021-12-15 09:03:22,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:03:22,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:03:22,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:03:22,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:03:22,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:03:20" (1/3) ... [2021-12-15 09:03:22,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cff625f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:03:22, skipping insertion in model container [2021-12-15 09:03:22,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:21" (2/3) ... [2021-12-15 09:03:22,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cff625f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:03:22, skipping insertion in model container [2021-12-15 09:03:22,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:03:22" (3/3) ... [2021-12-15 09:03:22,713 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label09.c [2021-12-15 09:03:22,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:03:22,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:03:22,760 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:03:22,766 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:03:22,766 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:03:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 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) [2021-12-15 09:03:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-15 09:03:22,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:22,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:22,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 539726418, now seen corresponding path program 1 times [2021-12-15 09:03:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409895257] [2021-12-15 09:03:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:22,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:23,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:23,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409895257] [2021-12-15 09:03:23,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409895257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:23,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:23,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:23,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954594175] [2021-12-15 09:03:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:23,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:23,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:23,260 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 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) Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:24,133 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2021-12-15 09:03:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-12-15 09:03:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:24,144 INFO L225 Difference]: With dead ends: 824 [2021-12-15 09:03:24,144 INFO L226 Difference]: Without dead ends: 445 [2021-12-15 09:03:24,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:24,149 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 82 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:24,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 247 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:03:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-15 09:03:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2021-12-15 09:03:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.417607223476298) internal successors, (628), 443 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 628 transitions. [2021-12-15 09:03:24,193 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 628 transitions. Word has length 148 [2021-12-15 09:03:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:24,193 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 628 transitions. [2021-12-15 09:03:24,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 628 transitions. [2021-12-15 09:03:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-15 09:03:24,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:24,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:24,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:03:24,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2034605455, now seen corresponding path program 1 times [2021-12-15 09:03:24,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:24,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659769979] [2021-12-15 09:03:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:24,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:24,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:24,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659769979] [2021-12-15 09:03:24,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659769979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:24,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:24,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:24,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699145523] [2021-12-15 09:03:24,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:24,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:24,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:24,257 INFO L87 Difference]: Start difference. First operand 444 states and 628 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:24,893 INFO L93 Difference]: Finished difference Result 1313 states and 1864 transitions. [2021-12-15 09:03:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-12-15 09:03:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:24,900 INFO L225 Difference]: With dead ends: 1313 [2021-12-15 09:03:24,900 INFO L226 Difference]: Without dead ends: 871 [2021-12-15 09:03:24,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:24,902 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:24,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-15 09:03:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 857. [2021-12-15 09:03:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.3831775700934579) internal successors, (1184), 856 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1184 transitions. [2021-12-15 09:03:24,923 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1184 transitions. Word has length 156 [2021-12-15 09:03:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:24,923 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1184 transitions. [2021-12-15 09:03:24,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1184 transitions. [2021-12-15 09:03:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-15 09:03:24,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:24,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:03:24,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1667667688, now seen corresponding path program 1 times [2021-12-15 09:03:24,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:24,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194864723] [2021-12-15 09:03:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:24,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:03:24,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:24,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194864723] [2021-12-15 09:03:24,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194864723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:24,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:24,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:24,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850616107] [2021-12-15 09:03:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:24,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:24,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:24,997 INFO L87 Difference]: Start difference. First operand 857 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:25,203 INFO L93 Difference]: Finished difference Result 2550 states and 3525 transitions. [2021-12-15 09:03:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 168 [2021-12-15 09:03:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:25,209 INFO L225 Difference]: With dead ends: 2550 [2021-12-15 09:03:25,209 INFO L226 Difference]: Without dead ends: 1695 [2021-12-15 09:03:25,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:25,211 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 361 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:25,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 585 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:03:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-12-15 09:03:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1692. [2021-12-15 09:03:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 1.3826138379657007) internal successors, (2338), 1691 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2338 transitions. [2021-12-15 09:03:25,239 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2338 transitions. Word has length 168 [2021-12-15 09:03:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:25,239 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2338 transitions. [2021-12-15 09:03:25,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2338 transitions. [2021-12-15 09:03:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-15 09:03:25,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:25,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:25,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:03:25,265 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash -548989453, now seen corresponding path program 1 times [2021-12-15 09:03:25,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:25,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336122971] [2021-12-15 09:03:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:25,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:25,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:25,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336122971] [2021-12-15 09:03:25,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336122971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:25,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669033852] [2021-12-15 09:03:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:25,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:25,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:25,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:03:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:25,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:25,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669033852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:25,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:25,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:03:25,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939515477] [2021-12-15 09:03:25,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:25,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:25,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:25,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:25,732 INFO L87 Difference]: Start difference. First operand 1692 states and 2338 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:26,351 INFO L93 Difference]: Finished difference Result 4202 states and 6017 transitions. [2021-12-15 09:03:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 170 [2021-12-15 09:03:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:26,359 INFO L225 Difference]: With dead ends: 4202 [2021-12-15 09:03:26,359 INFO L226 Difference]: Without dead ends: 2512 [2021-12-15 09:03:26,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:26,367 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 234 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:26,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 402 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-12-15 09:03:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2509. [2021-12-15 09:03:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 1.3209728867623605) internal successors, (3313), 2508 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3313 transitions. [2021-12-15 09:03:26,423 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3313 transitions. Word has length 170 [2021-12-15 09:03:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3313 transitions. [2021-12-15 09:03:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3313 transitions. [2021-12-15 09:03:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 09:03:26,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:26,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:26,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:03:26,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:26,646 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash -921361276, now seen corresponding path program 1 times [2021-12-15 09:03:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:26,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881187060] [2021-12-15 09:03:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:26,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:03:26,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:26,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881187060] [2021-12-15 09:03:26,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881187060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:26,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:26,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:26,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932738743] [2021-12-15 09:03:26,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:26,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:26,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:26,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:26,721 INFO L87 Difference]: Start difference. First operand 2509 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:27,016 INFO L93 Difference]: Finished difference Result 4977 states and 6572 transitions. [2021-12-15 09:03:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 176 [2021-12-15 09:03:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:27,025 INFO L225 Difference]: With dead ends: 4977 [2021-12-15 09:03:27,026 INFO L226 Difference]: Without dead ends: 2470 [2021-12-15 09:03:27,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:27,031 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 326 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:27,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:03:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-12-15 09:03:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2470. [2021-12-15 09:03:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 1.2705548805184286) internal successors, (3137), 2469 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 3137 transitions. [2021-12-15 09:03:27,085 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 3137 transitions. Word has length 176 [2021-12-15 09:03:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:27,085 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 3137 transitions. [2021-12-15 09:03:27,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 3137 transitions. [2021-12-15 09:03:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 09:03:27,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:27,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:27,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:03:27,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1448450622, now seen corresponding path program 1 times [2021-12-15 09:03:27,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:27,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956549263] [2021-12-15 09:03:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:27,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:27,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956549263] [2021-12-15 09:03:27,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956549263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204210874] [2021-12-15 09:03:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:27,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:27,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:27,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:03:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 09:03:27,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:27,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204210874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:27,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:27,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:03:27,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027622977] [2021-12-15 09:03:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:27,619 INFO L87 Difference]: Start difference. First operand 2470 states and 3137 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:28,097 INFO L93 Difference]: Finished difference Result 7187 states and 9159 transitions. [2021-12-15 09:03:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 185 [2021-12-15 09:03:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:28,112 INFO L225 Difference]: With dead ends: 7187 [2021-12-15 09:03:28,112 INFO L226 Difference]: Without dead ends: 4719 [2021-12-15 09:03:28,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:28,117 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:28,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 113 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:03:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2021-12-15 09:03:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 4304. [2021-12-15 09:03:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4303 states have (on average 1.280269579363235) internal successors, (5509), 4303 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5509 transitions. [2021-12-15 09:03:28,209 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5509 transitions. Word has length 185 [2021-12-15 09:03:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5509 transitions. [2021-12-15 09:03:28,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5509 transitions. [2021-12-15 09:03:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-15 09:03:28,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:28,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:28,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:28,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 09:03:28,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1285230358, now seen corresponding path program 1 times [2021-12-15 09:03:28,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:28,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614221048] [2021-12-15 09:03:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:28,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:28,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614221048] [2021-12-15 09:03:28,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614221048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274169313] [2021-12-15 09:03:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:28,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:28,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:03:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:03:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:28,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:28,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274169313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:28,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:28,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:28,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735309419] [2021-12-15 09:03:28,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:28,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:28,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:28,834 INFO L87 Difference]: Start difference. First operand 4304 states and 5509 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:29,390 INFO L93 Difference]: Finished difference Result 11453 states and 14898 transitions. [2021-12-15 09:03:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:29,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-12-15 09:03:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:29,410 INFO L225 Difference]: With dead ends: 11453 [2021-12-15 09:03:29,410 INFO L226 Difference]: Without dead ends: 7151 [2021-12-15 09:03:29,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:29,416 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:29,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 309 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-12-15 09:03:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 6336. [2021-12-15 09:03:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6336 states, 6335 states have (on average 1.269455406471981) internal successors, (8042), 6335 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6336 states to 6336 states and 8042 transitions. [2021-12-15 09:03:29,544 INFO L78 Accepts]: Start accepts. Automaton has 6336 states and 8042 transitions. Word has length 186 [2021-12-15 09:03:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:29,544 INFO L470 AbstractCegarLoop]: Abstraction has 6336 states and 8042 transitions. [2021-12-15 09:03:29,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 6336 states and 8042 transitions. [2021-12-15 09:03:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 09:03:29,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:29,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:29,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:29,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:29,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1481382606, now seen corresponding path program 1 times [2021-12-15 09:03:29,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:29,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680194935] [2021-12-15 09:03:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:29,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:03:29,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680194935] [2021-12-15 09:03:29,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680194935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:29,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:29,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:29,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429218111] [2021-12-15 09:03:29,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:29,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:29,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:29,818 INFO L87 Difference]: Start difference. First operand 6336 states and 8042 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:30,431 INFO L93 Difference]: Finished difference Result 15323 states and 19523 transitions. [2021-12-15 09:03:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 191 [2021-12-15 09:03:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:30,453 INFO L225 Difference]: With dead ends: 15323 [2021-12-15 09:03:30,453 INFO L226 Difference]: Without dead ends: 8989 [2021-12-15 09:03:30,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:30,461 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 201 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:30,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 181 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8989 states. [2021-12-15 09:03:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8989 to 8778. [2021-12-15 09:03:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8778 states, 8777 states have (on average 1.2791386578557593) internal successors, (11227), 8777 states have internal predecessors, (11227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8778 states to 8778 states and 11227 transitions. [2021-12-15 09:03:30,662 INFO L78 Accepts]: Start accepts. Automaton has 8778 states and 11227 transitions. Word has length 191 [2021-12-15 09:03:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:30,662 INFO L470 AbstractCegarLoop]: Abstraction has 8778 states and 11227 transitions. [2021-12-15 09:03:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8778 states and 11227 transitions. [2021-12-15 09:03:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-15 09:03:30,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:30,671 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:30,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:03:30,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash -639287990, now seen corresponding path program 1 times [2021-12-15 09:03:30,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:30,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585738159] [2021-12-15 09:03:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:30,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 09:03:30,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:30,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585738159] [2021-12-15 09:03:30,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585738159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:30,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:30,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799825087] [2021-12-15 09:03:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:03:30,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:03:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:03:30,758 INFO L87 Difference]: Start difference. First operand 8778 states and 11227 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:31,333 INFO L93 Difference]: Finished difference Result 15727 states and 19951 transitions. [2021-12-15 09:03:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:03:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 217 [2021-12-15 09:03:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:31,357 INFO L225 Difference]: With dead ends: 15727 [2021-12-15 09:03:31,358 INFO L226 Difference]: Without dead ends: 8784 [2021-12-15 09:03:31,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:03:31,365 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 472 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:31,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 44 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8784 states. [2021-12-15 09:03:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8784 to 8778. [2021-12-15 09:03:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8778 states, 8777 states have (on average 1.269568189586419) internal successors, (11143), 8777 states have internal predecessors, (11143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8778 states to 8778 states and 11143 transitions. [2021-12-15 09:03:31,488 INFO L78 Accepts]: Start accepts. Automaton has 8778 states and 11143 transitions. Word has length 217 [2021-12-15 09:03:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:31,488 INFO L470 AbstractCegarLoop]: Abstraction has 8778 states and 11143 transitions. [2021-12-15 09:03:31,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8778 states and 11143 transitions. [2021-12-15 09:03:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 09:03:31,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:31,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:31,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:03:31,497 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -411032834, now seen corresponding path program 1 times [2021-12-15 09:03:31,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:31,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716446218] [2021-12-15 09:03:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:31,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:03:31,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:31,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716446218] [2021-12-15 09:03:31,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716446218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:31,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:31,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:31,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449952269] [2021-12-15 09:03:31,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:31,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:31,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:31,578 INFO L87 Difference]: Start difference. First operand 8778 states and 11143 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:32,195 INFO L93 Difference]: Finished difference Result 17960 states and 22466 transitions. [2021-12-15 09:03:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:32,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 224 [2021-12-15 09:03:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:32,212 INFO L225 Difference]: With dead ends: 17960 [2021-12-15 09:03:32,212 INFO L226 Difference]: Without dead ends: 11017 [2021-12-15 09:03:32,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:32,220 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 153 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:32,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 162 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11017 states. [2021-12-15 09:03:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11017 to 11011. [2021-12-15 09:03:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11011 states, 11010 states have (on average 1.2494096276112625) internal successors, (13756), 11010 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11011 states to 11011 states and 13756 transitions. [2021-12-15 09:03:32,375 INFO L78 Accepts]: Start accepts. Automaton has 11011 states and 13756 transitions. Word has length 224 [2021-12-15 09:03:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:32,375 INFO L470 AbstractCegarLoop]: Abstraction has 11011 states and 13756 transitions. [2021-12-15 09:03:32,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11011 states and 13756 transitions. [2021-12-15 09:03:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 09:03:32,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:32,386 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:32,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:03:32,387 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash 742456631, now seen corresponding path program 1 times [2021-12-15 09:03:32,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:32,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371112139] [2021-12-15 09:03:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:32,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 09:03:32,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:32,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371112139] [2021-12-15 09:03:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371112139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:32,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:32,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:32,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566745782] [2021-12-15 09:03:32,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:32,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:32,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:32,454 INFO L87 Difference]: Start difference. First operand 11011 states and 13756 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:32,972 INFO L93 Difference]: Finished difference Result 20390 states and 25241 transitions. [2021-12-15 09:03:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 225 [2021-12-15 09:03:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:32,988 INFO L225 Difference]: With dead ends: 20390 [2021-12-15 09:03:32,988 INFO L226 Difference]: Without dead ends: 11417 [2021-12-15 09:03:32,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:32,994 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:32,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 156 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:03:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11417 states. [2021-12-15 09:03:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11417 to 11417. [2021-12-15 09:03:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11417 states, 11416 states have (on average 1.243780658724597) internal successors, (14199), 11416 states have internal predecessors, (14199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11417 states to 11417 states and 14199 transitions. [2021-12-15 09:03:33,143 INFO L78 Accepts]: Start accepts. Automaton has 11417 states and 14199 transitions. Word has length 225 [2021-12-15 09:03:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:33,144 INFO L470 AbstractCegarLoop]: Abstraction has 11417 states and 14199 transitions. [2021-12-15 09:03:33,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11417 states and 14199 transitions. [2021-12-15 09:03:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-15 09:03:33,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:33,154 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:33,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:03:33,154 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 453064105, now seen corresponding path program 2 times [2021-12-15 09:03:33,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:33,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067048450] [2021-12-15 09:03:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:33,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:03:33,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067048450] [2021-12-15 09:03:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067048450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:33,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468014153] [2021-12-15 09:03:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 09:03:33,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:33,256 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:33,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:03:33,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 09:03:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 09:03:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-15 09:03:33,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468014153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:33,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:03:33,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076161711] [2021-12-15 09:03:33,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:33,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:33,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:33,701 INFO L87 Difference]: Start difference. First operand 11417 states and 14199 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:34,233 INFO L93 Difference]: Finished difference Result 20799 states and 25688 transitions. [2021-12-15 09:03:34,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:34,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 231 [2021-12-15 09:03:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:34,248 INFO L225 Difference]: With dead ends: 20799 [2021-12-15 09:03:34,248 INFO L226 Difference]: Without dead ends: 11420 [2021-12-15 09:03:34,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:34,258 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:34,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 57 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11420 states. [2021-12-15 09:03:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11420 to 11417. [2021-12-15 09:03:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11417 states, 11416 states have (on average 1.2391380518570427) internal successors, (14146), 11416 states have internal predecessors, (14146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11417 states to 11417 states and 14146 transitions. [2021-12-15 09:03:34,390 INFO L78 Accepts]: Start accepts. Automaton has 11417 states and 14146 transitions. Word has length 231 [2021-12-15 09:03:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:34,390 INFO L470 AbstractCegarLoop]: Abstraction has 11417 states and 14146 transitions. [2021-12-15 09:03:34,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 11417 states and 14146 transitions. [2021-12-15 09:03:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-15 09:03:34,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:34,401 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:34,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:34,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:34,616 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2044620884, now seen corresponding path program 1 times [2021-12-15 09:03:34,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:34,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615897929] [2021-12-15 09:03:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:34,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 09:03:34,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615897929] [2021-12-15 09:03:34,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615897929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577868553] [2021-12-15 09:03:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:34,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:34,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:34,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:03:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:03:34,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:35,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577868553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:35,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:35,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-15 09:03:35,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986297813] [2021-12-15 09:03:35,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:35,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:03:35,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:03:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:35,284 INFO L87 Difference]: Start difference. First operand 11417 states and 14146 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:35,960 INFO L93 Difference]: Finished difference Result 28341 states and 34786 transitions. [2021-12-15 09:03:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:03:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 248 [2021-12-15 09:03:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:35,987 INFO L225 Difference]: With dead ends: 28341 [2021-12-15 09:03:35,987 INFO L226 Difference]: Without dead ends: 17535 [2021-12-15 09:03:36,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:36,001 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 882 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:36,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 51 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17535 states. [2021-12-15 09:03:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17535 to 16718. [2021-12-15 09:03:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16718 states, 16717 states have (on average 1.2206735658311898) internal successors, (20406), 16717 states have internal predecessors, (20406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16718 states to 16718 states and 20406 transitions. [2021-12-15 09:03:36,185 INFO L78 Accepts]: Start accepts. Automaton has 16718 states and 20406 transitions. Word has length 248 [2021-12-15 09:03:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:36,185 INFO L470 AbstractCegarLoop]: Abstraction has 16718 states and 20406 transitions. [2021-12-15 09:03:36,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 16718 states and 20406 transitions. [2021-12-15 09:03:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-15 09:03:36,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:36,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:36,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:36,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 09:03:36,412 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1527345760, now seen corresponding path program 1 times [2021-12-15 09:03:36,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:36,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974739185] [2021-12-15 09:03:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:36,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 09:03:36,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:36,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974739185] [2021-12-15 09:03:36,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974739185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:36,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841001907] [2021-12-15 09:03:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:36,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:36,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:36,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:03:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:36,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:03:36,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:36,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841001907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:36,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:36,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:36,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674039292] [2021-12-15 09:03:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:36,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:36,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:36,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:36,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:36,907 INFO L87 Difference]: Start difference. First operand 16718 states and 20406 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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) [2021-12-15 09:03:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:37,529 INFO L93 Difference]: Finished difference Result 44639 states and 55032 transitions. [2021-12-15 09:03:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:37,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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) Word has length 259 [2021-12-15 09:03:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:37,571 INFO L225 Difference]: With dead ends: 44639 [2021-12-15 09:03:37,571 INFO L226 Difference]: Without dead ends: 28532 [2021-12-15 09:03:37,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:37,588 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 109 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:37,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 141 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28532 states. [2021-12-15 09:03:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28532 to 27706. [2021-12-15 09:03:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27706 states, 27705 states have (on average 1.199602959754557) internal successors, (33235), 27705 states have internal predecessors, (33235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27706 states to 27706 states and 33235 transitions. [2021-12-15 09:03:38,000 INFO L78 Accepts]: Start accepts. Automaton has 27706 states and 33235 transitions. Word has length 259 [2021-12-15 09:03:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:38,000 INFO L470 AbstractCegarLoop]: Abstraction has 27706 states and 33235 transitions. [2021-12-15 09:03:38,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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) [2021-12-15 09:03:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 27706 states and 33235 transitions. [2021-12-15 09:03:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 09:03:38,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:38,013 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:38,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:38,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:38,213 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash 892170257, now seen corresponding path program 1 times [2021-12-15 09:03:38,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:38,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700340824] [2021-12-15 09:03:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:38,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-15 09:03:38,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:38,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700340824] [2021-12-15 09:03:38,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700340824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:38,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101515754] [2021-12-15 09:03:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:38,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:38,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:38,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:03:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:03:38,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:38,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101515754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:38,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:38,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:38,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684731502] [2021-12-15 09:03:38,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:38,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:38,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:38,671 INFO L87 Difference]: Start difference. First operand 27706 states and 33235 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:39,360 INFO L93 Difference]: Finished difference Result 62521 states and 76379 transitions. [2021-12-15 09:03:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 270 [2021-12-15 09:03:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:39,396 INFO L225 Difference]: With dead ends: 62521 [2021-12-15 09:03:39,396 INFO L226 Difference]: Without dead ends: 35426 [2021-12-15 09:03:39,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:39,413 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 181 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:39,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 135 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35426 states. [2021-12-15 09:03:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35426 to 35420. [2021-12-15 09:03:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35420 states, 35419 states have (on average 1.1660408255456112) internal successors, (41300), 35419 states have internal predecessors, (41300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35420 states to 35420 states and 41300 transitions. [2021-12-15 09:03:39,864 INFO L78 Accepts]: Start accepts. Automaton has 35420 states and 41300 transitions. Word has length 270 [2021-12-15 09:03:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:39,864 INFO L470 AbstractCegarLoop]: Abstraction has 35420 states and 41300 transitions. [2021-12-15 09:03:39,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 35420 states and 41300 transitions. [2021-12-15 09:03:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-15 09:03:39,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:39,879 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:39,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 09:03:40,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:40,089 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1051794057, now seen corresponding path program 1 times [2021-12-15 09:03:40,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:40,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574132094] [2021-12-15 09:03:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:40,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 165 proven. 13 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:03:40,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574132094] [2021-12-15 09:03:40,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574132094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285853044] [2021-12-15 09:03:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:40,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:40,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:40,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:03:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 09:03:40,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:40,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285853044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:40,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:40,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:03:40,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254683774] [2021-12-15 09:03:40,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:40,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:40,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:40,703 INFO L87 Difference]: Start difference. First operand 35420 states and 41300 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:41,168 INFO L93 Difference]: Finished difference Result 100363 states and 117184 transitions. [2021-12-15 09:03:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 301 [2021-12-15 09:03:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:41,249 INFO L225 Difference]: With dead ends: 100363 [2021-12-15 09:03:41,250 INFO L226 Difference]: Without dead ends: 65554 [2021-12-15 09:03:41,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:41,278 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 238 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:41,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 550 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:03:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65554 states. [2021-12-15 09:03:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65554 to 65552. [2021-12-15 09:03:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65552 states, 65551 states have (on average 1.1663132522768531) internal successors, (76453), 65551 states have internal predecessors, (76453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65552 states to 65552 states and 76453 transitions. [2021-12-15 09:03:42,142 INFO L78 Accepts]: Start accepts. Automaton has 65552 states and 76453 transitions. Word has length 301 [2021-12-15 09:03:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:42,142 INFO L470 AbstractCegarLoop]: Abstraction has 65552 states and 76453 transitions. [2021-12-15 09:03:42,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 65552 states and 76453 transitions. [2021-12-15 09:03:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-15 09:03:42,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:42,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:42,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:42,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:03:42,504 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -510172343, now seen corresponding path program 1 times [2021-12-15 09:03:42,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611449948] [2021-12-15 09:03:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:42,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 160 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 09:03:42,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611449948] [2021-12-15 09:03:42,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611449948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373154168] [2021-12-15 09:03:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:42,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:42,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:42,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:03:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:03:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-15 09:03:43,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:43,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373154168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:43,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:43,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:03:43,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472522476] [2021-12-15 09:03:43,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:43,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:43,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:43,129 INFO L87 Difference]: Start difference. First operand 65552 states and 76453 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:43,698 INFO L93 Difference]: Finished difference Result 130485 states and 152236 transitions. [2021-12-15 09:03:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 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 308 [2021-12-15 09:03:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:43,776 INFO L225 Difference]: With dead ends: 130485 [2021-12-15 09:03:43,776 INFO L226 Difference]: Without dead ends: 65544 [2021-12-15 09:03:43,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:43,807 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:43,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 29 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:03:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65544 states. [2021-12-15 09:03:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65544 to 65544. [2021-12-15 09:03:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65544 states, 65543 states have (on average 1.1662114947439086) internal successors, (76437), 65543 states have internal predecessors, (76437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65544 states to 65544 states and 76437 transitions. [2021-12-15 09:03:44,736 INFO L78 Accepts]: Start accepts. Automaton has 65544 states and 76437 transitions. Word has length 308 [2021-12-15 09:03:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:44,736 INFO L470 AbstractCegarLoop]: Abstraction has 65544 states and 76437 transitions. [2021-12-15 09:03:44,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 65544 states and 76437 transitions. [2021-12-15 09:03:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-15 09:03:44,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:44,760 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:44,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:44,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:03:44,978 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash -862670896, now seen corresponding path program 1 times [2021-12-15 09:03:44,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:44,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361513384] [2021-12-15 09:03:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:44,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 176 proven. 11 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 09:03:45,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361513384] [2021-12-15 09:03:45,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361513384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525093343] [2021-12-15 09:03:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:45,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:45,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:45,093 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:45,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 09:03:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-15 09:03:45,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:45,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525093343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:45,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:45,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:45,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647206066] [2021-12-15 09:03:45,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:45,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:45,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:45,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:45,761 INFO L87 Difference]: Start difference. First operand 65544 states and 76437 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:46,742 INFO L93 Difference]: Finished difference Result 168309 states and 196369 transitions. [2021-12-15 09:03:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2021-12-15 09:03:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:46,882 INFO L225 Difference]: With dead ends: 168309 [2021-12-15 09:03:46,882 INFO L226 Difference]: Without dead ends: 103376 [2021-12-15 09:03:46,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:46,905 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:46,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 131 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103376 states. [2021-12-15 09:03:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103376 to 100522. [2021-12-15 09:03:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100522 states, 100521 states have (on average 1.1535997453268472) internal successors, (115961), 100521 states have internal predecessors, (115961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100522 states to 100522 states and 115961 transitions. [2021-12-15 09:03:48,399 INFO L78 Accepts]: Start accepts. Automaton has 100522 states and 115961 transitions. Word has length 314 [2021-12-15 09:03:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:48,400 INFO L470 AbstractCegarLoop]: Abstraction has 100522 states and 115961 transitions. [2021-12-15 09:03:48,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 100522 states and 115961 transitions. [2021-12-15 09:03:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 09:03:48,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:48,433 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:48,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:48,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:03:48,640 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1910731640, now seen corresponding path program 1 times [2021-12-15 09:03:48,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:48,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813378134] [2021-12-15 09:03:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:48,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 09:03:48,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813378134] [2021-12-15 09:03:48,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813378134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:48,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:48,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:48,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345055627] [2021-12-15 09:03:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:48,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:48,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:48,738 INFO L87 Difference]: Start difference. First operand 100522 states and 115961 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:49,834 INFO L93 Difference]: Finished difference Result 186579 states and 215302 transitions. [2021-12-15 09:03:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 317 [2021-12-15 09:03:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:49,949 INFO L225 Difference]: With dead ends: 186579 [2021-12-15 09:03:49,949 INFO L226 Difference]: Without dead ends: 87074 [2021-12-15 09:03:49,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:49,986 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 243 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:49,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 323 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87074 states. [2021-12-15 09:03:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87074 to 83818. [2021-12-15 09:03:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83818 states, 83817 states have (on average 1.117052626555472) internal successors, (93628), 83817 states have internal predecessors, (93628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83818 states to 83818 states and 93628 transitions. [2021-12-15 09:03:51,113 INFO L78 Accepts]: Start accepts. Automaton has 83818 states and 93628 transitions. Word has length 317 [2021-12-15 09:03:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:51,114 INFO L470 AbstractCegarLoop]: Abstraction has 83818 states and 93628 transitions. [2021-12-15 09:03:51,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 83818 states and 93628 transitions. [2021-12-15 09:03:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-15 09:03:51,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:51,149 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:51,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:03:51,150 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash 901543556, now seen corresponding path program 1 times [2021-12-15 09:03:51,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:51,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124898484] [2021-12-15 09:03:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:51,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 224 proven. 11 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-15 09:03:51,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124898484] [2021-12-15 09:03:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124898484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820890359] [2021-12-15 09:03:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:51,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:51,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:51,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 09:03:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:51,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 09:03:51,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:51,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820890359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:51,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:51,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:51,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202315596] [2021-12-15 09:03:51,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:51,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:51,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:51,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:51,790 INFO L87 Difference]: Start difference. First operand 83818 states and 93628 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:52,766 INFO L93 Difference]: Finished difference Result 166026 states and 185541 transitions. [2021-12-15 09:03:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 340 [2021-12-15 09:03:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:52,859 INFO L225 Difference]: With dead ends: 166026 [2021-12-15 09:03:52,859 INFO L226 Difference]: Without dead ends: 83225 [2021-12-15 09:03:52,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:52,905 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 227 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:52,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 120 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83225 states. [2021-12-15 09:03:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83225 to 80976. [2021-12-15 09:03:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80976 states, 80975 states have (on average 1.104439641864773) internal successors, (89432), 80975 states have internal predecessors, (89432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80976 states to 80976 states and 89432 transitions. [2021-12-15 09:03:54,112 INFO L78 Accepts]: Start accepts. Automaton has 80976 states and 89432 transitions. Word has length 340 [2021-12-15 09:03:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:54,112 INFO L470 AbstractCegarLoop]: Abstraction has 80976 states and 89432 transitions. [2021-12-15 09:03:54,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 80976 states and 89432 transitions. [2021-12-15 09:03:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-15 09:03:54,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:54,140 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:03:54,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:54,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:54,341 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1412536609, now seen corresponding path program 1 times [2021-12-15 09:03:54,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122052156] [2021-12-15 09:03:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:54,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-15 09:03:54,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:54,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122052156] [2021-12-15 09:03:54,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122052156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:54,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:54,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:54,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138635790] [2021-12-15 09:03:54,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:54,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:54,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:54,439 INFO L87 Difference]: Start difference. First operand 80976 states and 89432 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:55,244 INFO L93 Difference]: Finished difference Result 150164 states and 165535 transitions. [2021-12-15 09:03:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 347 [2021-12-15 09:03:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:55,328 INFO L225 Difference]: With dead ends: 150164 [2021-12-15 09:03:55,328 INFO L226 Difference]: Without dead ends: 70205 [2021-12-15 09:03:55,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:55,589 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 225 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:55,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 318 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:03:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70205 states. [2021-12-15 09:03:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70205 to 66732. [2021-12-15 09:03:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66732 states, 66731 states have (on average 1.0883397521391858) internal successors, (72626), 66731 states have internal predecessors, (72626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66732 states to 66732 states and 72626 transitions. [2021-12-15 09:03:56,612 INFO L78 Accepts]: Start accepts. Automaton has 66732 states and 72626 transitions. Word has length 347 [2021-12-15 09:03:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:56,612 INFO L470 AbstractCegarLoop]: Abstraction has 66732 states and 72626 transitions. [2021-12-15 09:03:56,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 66732 states and 72626 transitions. [2021-12-15 09:03:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-15 09:03:56,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:56,644 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:56,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:03:56,644 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash 622420155, now seen corresponding path program 1 times [2021-12-15 09:03:56,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:56,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132839569] [2021-12-15 09:03:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:56,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 320 proven. 11 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-15 09:03:56,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132839569] [2021-12-15 09:03:56,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132839569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416192596] [2021-12-15 09:03:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:56,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:56,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:56,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 09:03:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-15 09:03:57,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:57,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416192596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:57,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:57,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:57,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260810069] [2021-12-15 09:03:57,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:57,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:57,352 INFO L87 Difference]: Start difference. First operand 66732 states and 72626 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:58,122 INFO L93 Difference]: Finished difference Result 173340 states and 188336 transitions. [2021-12-15 09:03:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 436 [2021-12-15 09:03:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:58,276 INFO L225 Difference]: With dead ends: 173340 [2021-12-15 09:03:58,276 INFO L226 Difference]: Without dead ends: 107625 [2021-12-15 09:03:58,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:58,291 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 262 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:58,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 789 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:03:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107625 states. [2021-12-15 09:03:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107625 to 107623. [2021-12-15 09:03:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107623 states, 107622 states have (on average 1.0802809834420473) internal successors, (116262), 107622 states have internal predecessors, (116262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107623 states to 107623 states and 116262 transitions. [2021-12-15 09:03:59,521 INFO L78 Accepts]: Start accepts. Automaton has 107623 states and 116262 transitions. Word has length 436 [2021-12-15 09:03:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:59,521 INFO L470 AbstractCegarLoop]: Abstraction has 107623 states and 116262 transitions. [2021-12-15 09:03:59,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 107623 states and 116262 transitions. [2021-12-15 09:03:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-15 09:03:59,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:59,554 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:59,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:59,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 09:03:59,770 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1456123827, now seen corresponding path program 1 times [2021-12-15 09:03:59,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:59,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280641886] [2021-12-15 09:03:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:59,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 401 proven. 124 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:04:00,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280641886] [2021-12-15 09:04:00,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280641886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77445406] [2021-12-15 09:04:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:00,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:00,219 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:00,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 09:04:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:04:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 299 proven. 174 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:04:00,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:04:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 299 proven. 174 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:04:01,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77445406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:04:01,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:04:01,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 09:04:01,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193388255] [2021-12-15 09:04:01,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:04:01,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:04:01,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:04:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:04:01,640 INFO L87 Difference]: Start difference. First operand 107623 states and 116262 transitions. Second operand has 9 states, 9 states have (on average 83.0) internal successors, (747), 8 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:09,135 INFO L93 Difference]: Finished difference Result 683667 states and 743445 transitions. [2021-12-15 09:04:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 09:04:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.0) internal successors, (747), 8 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2021-12-15 09:04:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:09,970 INFO L225 Difference]: With dead ends: 683667 [2021-12-15 09:04:09,970 INFO L226 Difference]: Without dead ends: 576249 [2021-12-15 09:04:10,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-12-15 09:04:10,064 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 5960 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 6359 mSolverCounterSat, 2695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5960 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 9054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2695 IncrementalHoareTripleChecker+Valid, 6359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:10,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5960 Valid, 466 Invalid, 9054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2695 Valid, 6359 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-15 09:04:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576249 states. [2021-12-15 09:04:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576249 to 285303. [2021-12-15 09:04:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285303 states, 285302 states have (on average 1.0784677289328501) internal successors, (307689), 285302 states have internal predecessors, (307689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285303 states to 285303 states and 307689 transitions. [2021-12-15 09:04:16,275 INFO L78 Accepts]: Start accepts. Automaton has 285303 states and 307689 transitions. Word has length 448 [2021-12-15 09:04:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:16,275 INFO L470 AbstractCegarLoop]: Abstraction has 285303 states and 307689 transitions. [2021-12-15 09:04:16,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.0) internal successors, (747), 8 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 285303 states and 307689 transitions. [2021-12-15 09:04:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-15 09:04:16,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:16,333 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:16,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:16,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 09:04:16,535 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash 30590884, now seen corresponding path program 1 times [2021-12-15 09:04:16,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:16,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372707292] [2021-12-15 09:04:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:16,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 365 proven. 11 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-15 09:04:16,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:16,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372707292] [2021-12-15 09:04:16,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372707292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:16,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944243517] [2021-12-15 09:04:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:16,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:16,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:16,660 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:16,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 09:04:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:04:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:04:17,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:17,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944243517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:17,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:17,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:17,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914119342] [2021-12-15 09:04:17,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:17,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:17,771 INFO L87 Difference]: Start difference. First operand 285303 states and 307689 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:20,594 INFO L93 Difference]: Finished difference Result 751836 states and 809950 transitions. [2021-12-15 09:04:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 470 [2021-12-15 09:04:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted.