./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label46.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem15_label46.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 e6cfda55b4df00060532ae07426d70949a0fc78613832cd8fb2b21614956b3d6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:30:11,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:30:11,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:30:11,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:30:11,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:30:11,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:30:11,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:30:11,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:30:11,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:30:11,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:30:11,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:30:11,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:30:11,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:30:11,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:30:11,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:30:11,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:30:11,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:30:11,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:30:11,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:30:11,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:30:11,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:30:11,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:30:11,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:30:11,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:30:11,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:30:11,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:30:11,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:30:11,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:30:11,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:30:11,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:30:11,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:30:11,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:30:11,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:30:11,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:30:11,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:30:11,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:30:11,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:30:11,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:30:11,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:30:11,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:30:11,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:30:11,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:30:11,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:30:11,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:30:11,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:30:11,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:30:11,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:30:11,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:30:11,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:30:11,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:30:11,642 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:30:11,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:30:11,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:30:11,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:30:11,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:30:11,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:30:11,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:30:11,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:30:11,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:30:11,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:30:11,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:30:11,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:30:11,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:30:11,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:30:11,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:30:11,647 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:30:11,647 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:30:11,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:30:11,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:30:11,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6cfda55b4df00060532ae07426d70949a0fc78613832cd8fb2b21614956b3d6 [2021-12-22 09:30:11,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:30:11,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:30:11,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:30:11,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:30:11,881 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:30:11,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label46.c [2021-12-22 09:30:11,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4f0530c/cb37e46e0946422b8c1fb84165f7e55a/FLAG44aae2bd2 [2021-12-22 09:30:12,395 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:30:12,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label46.c [2021-12-22 09:30:12,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4f0530c/cb37e46e0946422b8c1fb84165f7e55a/FLAG44aae2bd2 [2021-12-22 09:30:12,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4f0530c/cb37e46e0946422b8c1fb84165f7e55a [2021-12-22 09:30:12,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:30:12,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:30:12,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:30:12,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:30:12,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:30:12,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:30:12" (1/1) ... [2021-12-22 09:30:12,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92726d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:12, skipping insertion in model container [2021-12-22 09:30:12,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:30:12" (1/1) ... [2021-12-22 09:30:12,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:30:12,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:30:12,946 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/Problem15_label46.c[5357,5370] [2021-12-22 09:30:13,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:30:13,209 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:30:13,233 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/Problem15_label46.c[5357,5370] [2021-12-22 09:30:13,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:30:13,365 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:30:13,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13 WrapperNode [2021-12-22 09:30:13,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:30:13,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:30:13,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:30:13,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:30:13,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,549 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:30:13,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:30:13,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:30:13,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:30:13,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:30:13,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:30:13,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:30:13,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:30:13,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:30:13,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (1/1) ... [2021-12-22 09:30:13,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:30:13,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:13,733 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) [2021-12-22 09:30:13,761 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 [2021-12-22 09:30:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:30:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:30:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:30:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:30:13,840 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:30:13,841 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:30:15,550 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:30:15,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:30:15,558 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:30:15,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:30:15 BoogieIcfgContainer [2021-12-22 09:30:15,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:30:15,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:30:15,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:30:15,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:30:15,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:30:12" (1/3) ... [2021-12-22 09:30:15,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d2bcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:30:15, skipping insertion in model container [2021-12-22 09:30:15,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:13" (2/3) ... [2021-12-22 09:30:15,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d2bcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:30:15, skipping insertion in model container [2021-12-22 09:30:15,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:30:15" (3/3) ... [2021-12-22 09:30:15,565 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label46.c [2021-12-22 09:30:15,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:30:15,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:30:15,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:30:15,603 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 [2021-12-22 09:30:15,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:30:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 09:30:15,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:15,623 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] [2021-12-22 09:30:15,623 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-22 09:30:15,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055783441] [2021-12-22 09:30:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:15,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:15,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055783441] [2021-12-22 09:30:15,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055783441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:15,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:15,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455865321] [2021-12-22 09:30:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:15,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:15,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:15,787 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:17,446 INFO L93 Difference]: Finished difference Result 1191 states and 2157 transitions. [2021-12-22 09:30:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-22 09:30:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:17,458 INFO L225 Difference]: With dead ends: 1191 [2021-12-22 09:30:17,458 INFO L226 Difference]: Without dead ends: 688 [2021-12-22 09:30:17,461 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 [2021-12-22 09:30:17,463 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 328 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:17,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 230 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:30:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-22 09:30:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 680. [2021-12-22 09:30:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.609720176730486) internal successors, (1093), 679 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1093 transitions. [2021-12-22 09:30:17,518 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1093 transitions. Word has length 43 [2021-12-22 09:30:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1093 transitions. [2021-12-22 09:30:17,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1093 transitions. [2021-12-22 09:30:17,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 09:30:17,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:17,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:17,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:30:17,522 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash 618077297, now seen corresponding path program 1 times [2021-12-22 09:30:17,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:17,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730788808] [2021-12-22 09:30:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:17,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:17,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730788808] [2021-12-22 09:30:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730788808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:17,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:17,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:17,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320287906] [2021-12-22 09:30:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:17,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:17,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:17,627 INFO L87 Difference]: Start difference. First operand 680 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:19,017 INFO L93 Difference]: Finished difference Result 1964 states and 3171 transitions. [2021-12-22 09:30:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:19,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-22 09:30:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:19,023 INFO L225 Difference]: With dead ends: 1964 [2021-12-22 09:30:19,023 INFO L226 Difference]: Without dead ends: 1286 [2021-12-22 09:30:19,024 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 [2021-12-22 09:30:19,025 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 282 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:19,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 360 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-12-22 09:30:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1281. [2021-12-22 09:30:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 1.3953125) internal successors, (1786), 1280 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1786 transitions. [2021-12-22 09:30:19,052 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1786 transitions. Word has length 111 [2021-12-22 09:30:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:19,052 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1786 transitions. [2021-12-22 09:30:19,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1786 transitions. [2021-12-22 09:30:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 09:30:19,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:19,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:30:19,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1137270533, now seen corresponding path program 1 times [2021-12-22 09:30:19,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954529739] [2021-12-22 09:30:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:19,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:19,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954529739] [2021-12-22 09:30:19,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954529739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:19,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:19,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:19,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786981447] [2021-12-22 09:30:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:19,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:19,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:19,131 INFO L87 Difference]: Start difference. First operand 1281 states and 1786 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:20,524 INFO L93 Difference]: Finished difference Result 3766 states and 5246 transitions. [2021-12-22 09:30:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-22 09:30:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:20,535 INFO L225 Difference]: With dead ends: 3766 [2021-12-22 09:30:20,535 INFO L226 Difference]: Without dead ends: 2487 [2021-12-22 09:30:20,537 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 [2021-12-22 09:30:20,543 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 285 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:20,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-12-22 09:30:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2487. [2021-12-22 09:30:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.244569589702333) internal successors, (3094), 2486 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3094 transitions. [2021-12-22 09:30:20,581 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3094 transitions. Word has length 119 [2021-12-22 09:30:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:20,582 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3094 transitions. [2021-12-22 09:30:20,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3094 transitions. [2021-12-22 09:30:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 09:30:20,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:20,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:20,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:30:20,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:20,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash -724585743, now seen corresponding path program 1 times [2021-12-22 09:30:20,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255424330] [2021-12-22 09:30:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:20,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:20,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255424330] [2021-12-22 09:30:20,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255424330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:20,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:20,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:20,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780606772] [2021-12-22 09:30:20,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:20,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:20,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:20,685 INFO L87 Difference]: Start difference. First operand 2487 states and 3094 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:21,933 INFO L93 Difference]: Finished difference Result 6173 states and 7859 transitions. [2021-12-22 09:30:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-22 09:30:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:21,944 INFO L225 Difference]: With dead ends: 6173 [2021-12-22 09:30:21,944 INFO L226 Difference]: Without dead ends: 3688 [2021-12-22 09:30:21,948 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 [2021-12-22 09:30:21,954 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:21,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 364 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:30:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2021-12-22 09:30:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3387. [2021-12-22 09:30:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.2114589486119314) internal successors, (4102), 3386 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4102 transitions. [2021-12-22 09:30:22,000 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4102 transitions. Word has length 125 [2021-12-22 09:30:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:22,001 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4102 transitions. [2021-12-22 09:30:22,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4102 transitions. [2021-12-22 09:30:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-22 09:30:22,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:22,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:22,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:30:22,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1572668496, now seen corresponding path program 1 times [2021-12-22 09:30:22,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:22,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504500460] [2021-12-22 09:30:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:22,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 09:30:22,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:22,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504500460] [2021-12-22 09:30:22,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504500460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:22,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:22,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:22,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073749474] [2021-12-22 09:30:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:22,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:22,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:22,189 INFO L87 Difference]: Start difference. First operand 3387 states and 4102 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:23,572 INFO L93 Difference]: Finished difference Result 9172 states and 11160 transitions. [2021-12-22 09:30:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 239 [2021-12-22 09:30:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:23,586 INFO L225 Difference]: With dead ends: 9172 [2021-12-22 09:30:23,587 INFO L226 Difference]: Without dead ends: 5787 [2021-12-22 09:30:23,591 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 [2021-12-22 09:30:23,591 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 117 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:23,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 317 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2021-12-22 09:30:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 5186. [2021-12-22 09:30:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 1.1778206364513018) internal successors, (6107), 5185 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 6107 transitions. [2021-12-22 09:30:23,656 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 6107 transitions. Word has length 239 [2021-12-22 09:30:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:23,656 INFO L470 AbstractCegarLoop]: Abstraction has 5186 states and 6107 transitions. [2021-12-22 09:30:23,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 6107 transitions. [2021-12-22 09:30:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-22 09:30:23,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:23,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:23,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:30:23,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1270932647, now seen corresponding path program 1 times [2021-12-22 09:30:23,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:23,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950470953] [2021-12-22 09:30:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:23,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 09:30:23,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:23,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950470953] [2021-12-22 09:30:23,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950470953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:23,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:23,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:23,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838698919] [2021-12-22 09:30:23,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:23,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:23,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:23,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:23,797 INFO L87 Difference]: Start difference. First operand 5186 states and 6107 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 2 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:24,997 INFO L93 Difference]: Finished difference Result 10669 states and 12523 transitions. [2021-12-22 09:30:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 2 states have internal predecessors, (280), 0 states have call successors, (0), 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 320 [2021-12-22 09:30:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:25,011 INFO L225 Difference]: With dead ends: 10669 [2021-12-22 09:30:25,011 INFO L226 Difference]: Without dead ends: 5485 [2021-12-22 09:30:25,017 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 [2021-12-22 09:30:25,017 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:25,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:30:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2021-12-22 09:30:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 5485. [2021-12-22 09:30:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5484 states have (on average 1.1692195477753464) internal successors, (6412), 5484 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 6412 transitions. [2021-12-22 09:30:25,079 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 6412 transitions. Word has length 320 [2021-12-22 09:30:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:25,079 INFO L470 AbstractCegarLoop]: Abstraction has 5485 states and 6412 transitions. [2021-12-22 09:30:25,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 2 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 6412 transitions. [2021-12-22 09:30:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-22 09:30:25,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:25,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:25,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:30:25,083 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash 219486213, now seen corresponding path program 1 times [2021-12-22 09:30:25,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:25,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930861361] [2021-12-22 09:30:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:25,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:30:25,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:25,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930861361] [2021-12-22 09:30:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930861361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:25,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:25,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:25,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672610942] [2021-12-22 09:30:25,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:25,199 INFO L87 Difference]: Start difference. First operand 5485 states and 6412 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:26,527 INFO L93 Difference]: Finished difference Result 12762 states and 15152 transitions. [2021-12-22 09:30:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 330 [2021-12-22 09:30:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:26,545 INFO L225 Difference]: With dead ends: 12762 [2021-12-22 09:30:26,545 INFO L226 Difference]: Without dead ends: 7578 [2021-12-22 09:30:26,550 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 [2021-12-22 09:30:26,551 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 272 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:26,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-12-22 09:30:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 4883. [2021-12-22 09:30:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4883 states, 4882 states have (on average 1.1798443260958624) internal successors, (5760), 4882 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 5760 transitions. [2021-12-22 09:30:26,612 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 5760 transitions. Word has length 330 [2021-12-22 09:30:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:26,612 INFO L470 AbstractCegarLoop]: Abstraction has 4883 states and 5760 transitions. [2021-12-22 09:30:26,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 5760 transitions. [2021-12-22 09:30:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-22 09:30:26,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:26,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:26,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:30:26,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1273280494, now seen corresponding path program 1 times [2021-12-22 09:30:26,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:26,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164503999] [2021-12-22 09:30:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:26,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:26,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:26,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164503999] [2021-12-22 09:30:26,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164503999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:26,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:26,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:26,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777768580] [2021-12-22 09:30:26,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:26,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:26,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:26,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:26,740 INFO L87 Difference]: Start difference. First operand 4883 states and 5760 transitions. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:27,896 INFO L93 Difference]: Finished difference Result 9461 states and 11209 transitions. [2021-12-22 09:30:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 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 395 [2021-12-22 09:30:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:27,904 INFO L225 Difference]: With dead ends: 9461 [2021-12-22 09:30:27,905 INFO L226 Difference]: Without dead ends: 4879 [2021-12-22 09:30:27,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:27,909 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 314 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:27,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 144 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:30:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-12-22 09:30:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4877. [2021-12-22 09:30:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4877 states, 4876 states have (on average 1.1618129614438064) internal successors, (5665), 4876 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 5665 transitions. [2021-12-22 09:30:27,960 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 5665 transitions. Word has length 395 [2021-12-22 09:30:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:27,960 INFO L470 AbstractCegarLoop]: Abstraction has 4877 states and 5665 transitions. [2021-12-22 09:30:27,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 5665 transitions. [2021-12-22 09:30:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-22 09:30:27,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:27,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:27,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:30:27,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1803521659, now seen corresponding path program 1 times [2021-12-22 09:30:27,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:27,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055178012] [2021-12-22 09:30:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:27,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:28,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055178012] [2021-12-22 09:30:28,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055178012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:28,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:28,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:28,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862289064] [2021-12-22 09:30:28,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:28,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:28,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:28,087 INFO L87 Difference]: Start difference. First operand 4877 states and 5665 transitions. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:29,341 INFO L93 Difference]: Finished difference Result 11259 states and 13334 transitions. [2021-12-22 09:30:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 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 406 [2021-12-22 09:30:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:29,352 INFO L225 Difference]: With dead ends: 11259 [2021-12-22 09:30:29,353 INFO L226 Difference]: Without dead ends: 6683 [2021-12-22 09:30:29,356 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 [2021-12-22 09:30:29,358 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 249 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:29,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 597 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:30:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6683 states. [2021-12-22 09:30:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6683 to 6381. [2021-12-22 09:30:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6381 states, 6380 states have (on average 1.14435736677116) internal successors, (7301), 6380 states have internal predecessors, (7301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 7301 transitions. [2021-12-22 09:30:29,418 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 7301 transitions. Word has length 406 [2021-12-22 09:30:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:29,419 INFO L470 AbstractCegarLoop]: Abstraction has 6381 states and 7301 transitions. [2021-12-22 09:30:29,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 7301 transitions. [2021-12-22 09:30:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-22 09:30:29,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:29,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:30:29,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:30:29,422 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 397575410, now seen corresponding path program 1 times [2021-12-22 09:30:29,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:29,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065309558] [2021-12-22 09:30:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:29,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:30:29,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:29,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065309558] [2021-12-22 09:30:29,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065309558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:29,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:29,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:29,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689706368] [2021-12-22 09:30:29,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:29,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:29,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:29,534 INFO L87 Difference]: Start difference. First operand 6381 states and 7301 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:30,841 INFO L93 Difference]: Finished difference Result 14257 states and 16594 transitions. [2021-12-22 09:30:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 411 [2021-12-22 09:30:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:30,851 INFO L225 Difference]: With dead ends: 14257 [2021-12-22 09:30:30,852 INFO L226 Difference]: Without dead ends: 8177 [2021-12-22 09:30:30,856 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 [2021-12-22 09:30:30,857 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 245 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:30,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 618 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:30:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8177 states. [2021-12-22 09:30:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8177 to 7875. [2021-12-22 09:30:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 1.1343662687325375) internal successors, (8932), 7874 states have internal predecessors, (8932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 8932 transitions. [2021-12-22 09:30:30,932 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 8932 transitions. Word has length 411 [2021-12-22 09:30:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:30,932 INFO L470 AbstractCegarLoop]: Abstraction has 7875 states and 8932 transitions. [2021-12-22 09:30:30,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 8932 transitions. [2021-12-22 09:30:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-22 09:30:30,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:30,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:30,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:30:30,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:30,937 INFO L85 PathProgramCache]: Analyzing trace with hash -299601891, now seen corresponding path program 1 times [2021-12-22 09:30:30,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:30,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917458817] [2021-12-22 09:30:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:30,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-22 09:30:31,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917458817] [2021-12-22 09:30:31,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917458817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:31,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:31,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:31,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303751878] [2021-12-22 09:30:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:31,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:31,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:31,073 INFO L87 Difference]: Start difference. First operand 7875 states and 8932 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:32,402 INFO L93 Difference]: Finished difference Result 17541 states and 20149 transitions. [2021-12-22 09:30:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 507 [2021-12-22 09:30:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:32,415 INFO L225 Difference]: With dead ends: 17541 [2021-12-22 09:30:32,415 INFO L226 Difference]: Without dead ends: 9967 [2021-12-22 09:30:32,423 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 [2021-12-22 09:30:32,424 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 372 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:32,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 447 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9967 states. [2021-12-22 09:30:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9967 to 9967. [2021-12-22 09:30:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 1.1378687537627934) internal successors, (11340), 9966 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 11340 transitions. [2021-12-22 09:30:32,513 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 11340 transitions. Word has length 507 [2021-12-22 09:30:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:32,514 INFO L470 AbstractCegarLoop]: Abstraction has 9967 states and 11340 transitions. [2021-12-22 09:30:32,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 11340 transitions. [2021-12-22 09:30:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-12-22 09:30:32,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:32,518 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:32,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:30:32,519 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:32,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1686723748, now seen corresponding path program 1 times [2021-12-22 09:30:32,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:32,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407117509] [2021-12-22 09:30:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:32,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-22 09:30:32,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:32,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407117509] [2021-12-22 09:30:32,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407117509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:32,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:32,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:32,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909773478] [2021-12-22 09:30:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:32,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:32,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:32,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:32,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:32,685 INFO L87 Difference]: Start difference. First operand 9967 states and 11340 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:34,064 INFO L93 Difference]: Finished difference Result 24431 states and 27984 transitions. [2021-12-22 09:30:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:34,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 531 [2021-12-22 09:30:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:34,087 INFO L225 Difference]: With dead ends: 24431 [2021-12-22 09:30:34,087 INFO L226 Difference]: Without dead ends: 14765 [2021-12-22 09:30:34,096 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 [2021-12-22 09:30:34,097 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 248 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:34,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 596 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14765 states. [2021-12-22 09:30:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14765 to 14754. [2021-12-22 09:30:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14754 states, 14753 states have (on average 1.1218057344268961) internal successors, (16550), 14753 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14754 states to 14754 states and 16550 transitions. [2021-12-22 09:30:34,239 INFO L78 Accepts]: Start accepts. Automaton has 14754 states and 16550 transitions. Word has length 531 [2021-12-22 09:30:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:34,240 INFO L470 AbstractCegarLoop]: Abstraction has 14754 states and 16550 transitions. [2021-12-22 09:30:34,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14754 states and 16550 transitions. [2021-12-22 09:30:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-12-22 09:30:34,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:34,247 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:34,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:30:34,248 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2137585242, now seen corresponding path program 1 times [2021-12-22 09:30:34,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725582193] [2021-12-22 09:30:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:34,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-12-22 09:30:34,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725582193] [2021-12-22 09:30:34,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725582193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:34,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:34,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:34,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941768454] [2021-12-22 09:30:34,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:34,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:34,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:34,453 INFO L87 Difference]: Start difference. First operand 14754 states and 16550 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:35,534 INFO L93 Difference]: Finished difference Result 30403 states and 34062 transitions. [2021-12-22 09:30:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 585 [2021-12-22 09:30:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:35,552 INFO L225 Difference]: With dead ends: 30403 [2021-12-22 09:30:35,552 INFO L226 Difference]: Without dead ends: 14754 [2021-12-22 09:30:35,563 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 [2021-12-22 09:30:35,564 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 259 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:35,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 665 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:30:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14754 states. [2021-12-22 09:30:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14754 to 14754. [2021-12-22 09:30:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14754 states, 14753 states have (on average 1.1201111638310852) internal successors, (16525), 14753 states have internal predecessors, (16525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14754 states to 14754 states and 16525 transitions. [2021-12-22 09:30:35,732 INFO L78 Accepts]: Start accepts. Automaton has 14754 states and 16525 transitions. Word has length 585 [2021-12-22 09:30:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:35,733 INFO L470 AbstractCegarLoop]: Abstraction has 14754 states and 16525 transitions. [2021-12-22 09:30:35,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 14754 states and 16525 transitions. [2021-12-22 09:30:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-22 09:30:35,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:35,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:35,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:30:35,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1367354222, now seen corresponding path program 1 times [2021-12-22 09:30:35,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:35,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959928760] [2021-12-22 09:30:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:35,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 578 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-22 09:30:35,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959928760] [2021-12-22 09:30:35,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959928760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:30:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521695745] [2021-12-22 09:30:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:35,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:30:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:35,902 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) [2021-12-22 09:30:35,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:30:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:30:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:30:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 578 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-22 09:30:37,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:30:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 578 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-22 09:30:38,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521695745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:30:38,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:30:38,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 09:30:38,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172089498] [2021-12-22 09:30:38,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:30:38,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:30:38,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:30:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:30:38,563 INFO L87 Difference]: Start difference. First operand 14754 states and 16525 transitions. Second operand has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:43,636 INFO L93 Difference]: Finished difference Result 37541 states and 41836 transitions. [2021-12-22 09:30:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:30:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 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 598 [2021-12-22 09:30:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:43,655 INFO L225 Difference]: With dead ends: 37541 [2021-12-22 09:30:43,655 INFO L226 Difference]: Without dead ends: 17446 [2021-12-22 09:30:43,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1190 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-22 09:30:43,664 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 3067 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 5905 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3067 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 6598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 5905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:43,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3067 Valid, 282 Invalid, 6598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 5905 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-22 09:30:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17446 states. [2021-12-22 09:30:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17446 to 13556. [2021-12-22 09:30:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13556 states, 13555 states have (on average 1.0638878642567318) internal successors, (14421), 13555 states have internal predecessors, (14421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13556 states to 13556 states and 14421 transitions. [2021-12-22 09:30:43,802 INFO L78 Accepts]: Start accepts. Automaton has 13556 states and 14421 transitions. Word has length 598 [2021-12-22 09:30:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:43,803 INFO L470 AbstractCegarLoop]: Abstraction has 13556 states and 14421 transitions. [2021-12-22 09:30:43,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 13556 states and 14421 transitions. [2021-12-22 09:30:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-12-22 09:30:43,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:43,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:43,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:30:44,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 09:30:44,023 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash 910843091, now seen corresponding path program 1 times [2021-12-22 09:30:44,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147033502] [2021-12-22 09:30:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:44,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-12-22 09:30:44,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:44,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147033502] [2021-12-22 09:30:44,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147033502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:44,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:44,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:44,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431223891] [2021-12-22 09:30:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:44,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:44,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:44,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:44,211 INFO L87 Difference]: Start difference. First operand 13556 states and 14421 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:45,010 INFO L93 Difference]: Finished difference Result 26809 states and 28537 transitions. [2021-12-22 09:30:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 623 [2021-12-22 09:30:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:45,022 INFO L225 Difference]: With dead ends: 26809 [2021-12-22 09:30:45,022 INFO L226 Difference]: Without dead ends: 13554 [2021-12-22 09:30:45,030 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 [2021-12-22 09:30:45,030 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:45,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:30:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13554 states. [2021-12-22 09:30:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13554 to 13554. [2021-12-22 09:30:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13554 states, 13553 states have (on average 1.0637497233084925) internal successors, (14417), 13553 states have internal predecessors, (14417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 14417 transitions. [2021-12-22 09:30:45,142 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 14417 transitions. Word has length 623 [2021-12-22 09:30:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:45,143 INFO L470 AbstractCegarLoop]: Abstraction has 13554 states and 14417 transitions. [2021-12-22 09:30:45,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 14417 transitions. [2021-12-22 09:30:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2021-12-22 09:30:45,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:45,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:45,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 09:30:45,149 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -705848768, now seen corresponding path program 1 times [2021-12-22 09:30:45,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481311668] [2021-12-22 09:30:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:45,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 364 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-22 09:30:45,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481311668] [2021-12-22 09:30:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481311668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:30:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988190134] [2021-12-22 09:30:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:45,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:30:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:45,416 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) [2021-12-22 09:30:45,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:30:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:45,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:30:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:30:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-22 09:30:46,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:30:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988190134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:46,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:30:46,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 09:30:46,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410817099] [2021-12-22 09:30:46,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:46,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:46,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:46,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:46,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:30:46,241 INFO L87 Difference]: Start difference. First operand 13554 states and 14417 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:47,059 INFO L93 Difference]: Finished difference Result 27103 states and 28826 transitions. [2021-12-22 09:30:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 639 [2021-12-22 09:30:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:47,087 INFO L225 Difference]: With dead ends: 27103 [2021-12-22 09:30:47,087 INFO L226 Difference]: Without dead ends: 13551 [2021-12-22 09:30:47,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:30:47,129 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 286 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:47,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 520 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:30:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13551 states. [2021-12-22 09:30:47,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13551 to 12654. [2021-12-22 09:30:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12654 states, 12653 states have (on average 1.0376985695092074) internal successors, (13130), 12653 states have internal predecessors, (13130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12654 states to 12654 states and 13130 transitions. [2021-12-22 09:30:47,231 INFO L78 Accepts]: Start accepts. Automaton has 12654 states and 13130 transitions. Word has length 639 [2021-12-22 09:30:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:47,231 INFO L470 AbstractCegarLoop]: Abstraction has 12654 states and 13130 transitions. [2021-12-22 09:30:47,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 12654 states and 13130 transitions. [2021-12-22 09:30:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-12-22 09:30:47,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:47,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:47,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 09:30:47,451 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,SelfDestructingSolverStorable15 [2021-12-22 09:30:47,451 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 777769454, now seen corresponding path program 1 times [2021-12-22 09:30:47,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405843258] [2021-12-22 09:30:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:47,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-22 09:30:47,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405843258] [2021-12-22 09:30:47,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405843258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:47,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:47,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:47,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181127622] [2021-12-22 09:30:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:47,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:47,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:47,631 INFO L87 Difference]: Start difference. First operand 12654 states and 13130 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:48,601 INFO L93 Difference]: Finished difference Result 27714 states and 28795 transitions. [2021-12-22 09:30:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:48,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 668 [2021-12-22 09:30:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:48,623 INFO L225 Difference]: With dead ends: 27714 [2021-12-22 09:30:48,623 INFO L226 Difference]: Without dead ends: 15062 [2021-12-22 09:30:48,629 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 [2021-12-22 09:30:48,629 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 309 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:48,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 133 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:30:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15062 states. [2021-12-22 09:30:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15062 to 13551. [2021-12-22 09:30:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13551 states, 13550 states have (on average 1.0375645756457565) internal successors, (14059), 13550 states have internal predecessors, (14059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13551 states to 13551 states and 14059 transitions. [2021-12-22 09:30:48,752 INFO L78 Accepts]: Start accepts. Automaton has 13551 states and 14059 transitions. Word has length 668 [2021-12-22 09:30:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:48,752 INFO L470 AbstractCegarLoop]: Abstraction has 13551 states and 14059 transitions. [2021-12-22 09:30:48,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 13551 states and 14059 transitions. [2021-12-22 09:30:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2021-12-22 09:30:48,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:48,760 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:48,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:30:48,761 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash -694194177, now seen corresponding path program 1 times [2021-12-22 09:30:48,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:48,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708553306] [2021-12-22 09:30:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:48,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 566 proven. 190 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 09:30:48,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708553306] [2021-12-22 09:30:48,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708553306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:30:48,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257071022] [2021-12-22 09:30:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:48,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:30:48,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:48,934 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) [2021-12-22 09:30:48,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:30:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:30:49,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:30:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2021-12-22 09:30:53,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:30:53,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257071022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:53,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:30:53,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:30:53,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657654412] [2021-12-22 09:30:53,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:53,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:53,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:30:53,982 INFO L87 Difference]: Start difference. First operand 13551 states and 14059 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:54,014 INFO L93 Difference]: Finished difference Result 13594 states and 14102 transitions. [2021-12-22 09:30:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 675 [2021-12-22 09:30:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:54,025 INFO L225 Difference]: With dead ends: 13594 [2021-12-22 09:30:54,025 INFO L226 Difference]: Without dead ends: 13592 [2021-12-22 09:30:54,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:30:54,029 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:54,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 534 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 492 Unchecked, 0.0s Time] [2021-12-22 09:30:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13592 states. [2021-12-22 09:30:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13592 to 13592. [2021-12-22 09:30:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13592 states, 13591 states have (on average 1.0374512545066588) internal successors, (14100), 13591 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13592 states to 13592 states and 14100 transitions. [2021-12-22 09:30:54,158 INFO L78 Accepts]: Start accepts. Automaton has 13592 states and 14100 transitions. Word has length 675 [2021-12-22 09:30:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:54,158 INFO L470 AbstractCegarLoop]: Abstraction has 13592 states and 14100 transitions. [2021-12-22 09:30:54,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13592 states and 14100 transitions. [2021-12-22 09:30:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2021-12-22 09:30:54,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:54,165 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:54,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:30:54,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 09:30:54,373 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:54,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1257977755, now seen corresponding path program 1 times [2021-12-22 09:30:54,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:54,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930431989] [2021-12-22 09:30:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:54,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-22 09:30:54,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:54,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930431989] [2021-12-22 09:30:54,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930431989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:54,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:54,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:30:54,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435713035] [2021-12-22 09:30:54,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:54,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:30:54,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:30:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:30:54,547 INFO L87 Difference]: Start difference. First operand 13592 states and 14100 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:55,826 INFO L93 Difference]: Finished difference Result 30483 states and 31700 transitions. [2021-12-22 09:30:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:30:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 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 701 [2021-12-22 09:30:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:55,840 INFO L225 Difference]: With dead ends: 30483 [2021-12-22 09:30:55,840 INFO L226 Difference]: Without dead ends: 17192 [2021-12-22 09:30:55,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:30:55,849 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 671 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:55,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 440 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:30:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17192 states. [2021-12-22 09:30:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17192 to 15996. [2021-12-22 09:30:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15996 states, 15995 states have (on average 1.033823069709284) internal successors, (16536), 15995 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15996 states to 15996 states and 16536 transitions. [2021-12-22 09:30:56,009 INFO L78 Accepts]: Start accepts. Automaton has 15996 states and 16536 transitions. Word has length 701 [2021-12-22 09:30:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:56,009 INFO L470 AbstractCegarLoop]: Abstraction has 15996 states and 16536 transitions. [2021-12-22 09:30:56,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 15996 states and 16536 transitions. [2021-12-22 09:30:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-12-22 09:30:56,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:56,021 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:56,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 09:30:56,021 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1684815457, now seen corresponding path program 1 times [2021-12-22 09:30:56,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:56,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109172517] [2021-12-22 09:30:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:56,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2021-12-22 09:30:56,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109172517] [2021-12-22 09:30:56,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109172517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:56,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:56,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:30:56,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742057464] [2021-12-22 09:30:56,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:56,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:56,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:56,256 INFO L87 Difference]: Start difference. First operand 15996 states and 16536 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:57,165 INFO L93 Difference]: Finished difference Result 34100 states and 35289 transitions. [2021-12-22 09:30:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 821 [2021-12-22 09:30:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:57,263 INFO L225 Difference]: With dead ends: 34100 [2021-12-22 09:30:57,263 INFO L226 Difference]: Without dead ends: 18106 [2021-12-22 09:30:57,271 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 [2021-12-22 09:30:57,272 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 309 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:57,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 126 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:30:57,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18106 states. [2021-12-22 09:30:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18106 to 15058. [2021-12-22 09:30:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15058 states, 15057 states have (on average 1.0336056319319917) internal successors, (15563), 15057 states have internal predecessors, (15563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15058 states to 15058 states and 15563 transitions. [2021-12-22 09:30:57,448 INFO L78 Accepts]: Start accepts. Automaton has 15058 states and 15563 transitions. Word has length 821 [2021-12-22 09:30:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:57,448 INFO L470 AbstractCegarLoop]: Abstraction has 15058 states and 15563 transitions. [2021-12-22 09:30:57,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 15058 states and 15563 transitions. [2021-12-22 09:30:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2021-12-22 09:30:57,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:57,463 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 09:30:57,463 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1338684651, now seen corresponding path program 1 times [2021-12-22 09:30:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80229175] [2021-12-22 09:30:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:57,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 772 proven. 41 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-22 09:30:57,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:57,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80229175] [2021-12-22 09:30:57,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80229175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:30:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408979410] [2021-12-22 09:30:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:57,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:30:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:57,693 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) [2021-12-22 09:30:57,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:30:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:30:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:30:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-12-22 09:30:58,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:30:58,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408979410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:58,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:30:58,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:30:58,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450689549] [2021-12-22 09:30:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:58,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:58,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:30:58,827 INFO L87 Difference]: Start difference. First operand 15058 states and 15563 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:59,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:59,689 INFO L93 Difference]: Finished difference Result 35800 states and 37026 transitions. [2021-12-22 09:30:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:59,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 828 [2021-12-22 09:30:59,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:59,706 INFO L225 Difference]: With dead ends: 35800 [2021-12-22 09:30:59,706 INFO L226 Difference]: Without dead ends: 20744 [2021-12-22 09:30:59,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:30:59,715 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 287 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:59,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 523 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:30:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20744 states. [2021-12-22 09:30:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20744 to 18648. [2021-12-22 09:30:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18648 states, 18647 states have (on average 1.0310505711374485) internal successors, (19226), 18647 states have internal predecessors, (19226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18648 states to 18648 states and 19226 transitions. [2021-12-22 09:30:59,854 INFO L78 Accepts]: Start accepts. Automaton has 18648 states and 19226 transitions. Word has length 828 [2021-12-22 09:30:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:59,854 INFO L470 AbstractCegarLoop]: Abstraction has 18648 states and 19226 transitions. [2021-12-22 09:30:59,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 18648 states and 19226 transitions. [2021-12-22 09:30:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-12-22 09:30:59,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:59,867 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:30:59,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:31:00,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:00,068 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -712309912, now seen corresponding path program 1 times [2021-12-22 09:31:00,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157342202] [2021-12-22 09:31:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:00,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 745 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-12-22 09:31:00,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157342202] [2021-12-22 09:31:00,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157342202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:00,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:00,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:00,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416452096] [2021-12-22 09:31:00,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:00,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:00,279 INFO L87 Difference]: Start difference. First operand 18648 states and 19226 transitions. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:01,183 INFO L93 Difference]: Finished difference Result 40280 states and 41569 transitions. [2021-12-22 09:31:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 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 857 [2021-12-22 09:31:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:01,204 INFO L225 Difference]: With dead ends: 40280 [2021-12-22 09:31:01,204 INFO L226 Difference]: Without dead ends: 21933 [2021-12-22 09:31:01,215 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 [2021-12-22 09:31:01,216 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 92 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:01,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 170 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:31:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21933 states. [2021-12-22 09:31:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21933 to 20436. [2021-12-22 09:31:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20436 states, 20435 states have (on average 1.028823097626621) internal successors, (21024), 20435 states have internal predecessors, (21024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20436 states to 20436 states and 21024 transitions. [2021-12-22 09:31:01,387 INFO L78 Accepts]: Start accepts. Automaton has 20436 states and 21024 transitions. Word has length 857 [2021-12-22 09:31:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:01,387 INFO L470 AbstractCegarLoop]: Abstraction has 20436 states and 21024 transitions. [2021-12-22 09:31:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 20436 states and 21024 transitions. [2021-12-22 09:31:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2021-12-22 09:31:01,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:01,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:01,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 09:31:01,402 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash 579730196, now seen corresponding path program 1 times [2021-12-22 09:31:01,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:01,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796503776] [2021-12-22 09:31:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:01,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-22 09:31:01,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:01,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796503776] [2021-12-22 09:31:01,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796503776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:01,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:01,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:31:01,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650994387] [2021-12-22 09:31:01,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:01,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:31:01,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:31:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:31:01,625 INFO L87 Difference]: Start difference. First operand 20436 states and 21024 transitions. Second operand has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:02,965 INFO L93 Difference]: Finished difference Result 46559 states and 47864 transitions. [2021-12-22 09:31:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:31:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 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 910 [2021-12-22 09:31:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:02,988 INFO L225 Difference]: With dead ends: 46559 [2021-12-22 09:31:02,988 INFO L226 Difference]: Without dead ends: 24628 [2021-12-22 09:31:03,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:31:03,001 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 522 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:03,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 134 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24628 states. [2021-12-22 09:31:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24628 to 19836. [2021-12-22 09:31:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19836 states, 19835 states have (on average 1.0287874968490043) internal successors, (20406), 19835 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) [2021-12-22 09:31:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19836 states to 19836 states and 20406 transitions. [2021-12-22 09:31:03,182 INFO L78 Accepts]: Start accepts. Automaton has 19836 states and 20406 transitions. Word has length 910 [2021-12-22 09:31:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:03,183 INFO L470 AbstractCegarLoop]: Abstraction has 19836 states and 20406 transitions. [2021-12-22 09:31:03,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19836 states and 20406 transitions. [2021-12-22 09:31:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2021-12-22 09:31:03,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:03,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:03,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 09:31:03,198 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 548599927, now seen corresponding path program 1 times [2021-12-22 09:31:03,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:03,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597792556] [2021-12-22 09:31:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:03,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-12-22 09:31:03,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:03,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597792556] [2021-12-22 09:31:03,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597792556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:03,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:03,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:03,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952285165] [2021-12-22 09:31:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:03,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:03,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:03,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:03,404 INFO L87 Difference]: Start difference. First operand 19836 states and 20406 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:04,248 INFO L93 Difference]: Finished difference Result 42956 states and 44251 transitions. [2021-12-22 09:31:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:04,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 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 915 [2021-12-22 09:31:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:04,269 INFO L225 Difference]: With dead ends: 42956 [2021-12-22 09:31:04,270 INFO L226 Difference]: Without dead ends: 23421 [2021-12-22 09:31:04,282 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 [2021-12-22 09:31:04,283 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 307 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:04,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 512 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:31:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23421 states. [2021-12-22 09:31:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23421 to 20129. [2021-12-22 09:31:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20129 states, 20128 states have (on average 1.026381160572337) internal successors, (20659), 20128 states have internal predecessors, (20659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20129 states to 20129 states and 20659 transitions. [2021-12-22 09:31:04,461 INFO L78 Accepts]: Start accepts. Automaton has 20129 states and 20659 transitions. Word has length 915 [2021-12-22 09:31:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 20129 states and 20659 transitions. [2021-12-22 09:31:04,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20129 states and 20659 transitions. [2021-12-22 09:31:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2021-12-22 09:31:04,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:04,478 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:04,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 09:31:04,478 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1414559480, now seen corresponding path program 1 times [2021-12-22 09:31:04,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42043682] [2021-12-22 09:31:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:04,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 1459 proven. 26 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-22 09:31:04,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:04,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42043682] [2021-12-22 09:31:04,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42043682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:04,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108413490] [2021-12-22 09:31:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:04,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:04,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:04,821 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) [2021-12-22 09:31:04,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:31:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:31:05,103 INFO L286 TraceCheckSpWp]: Computing forward predicates...