./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label48.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 c03a342c0e8f0bfba399e237ba210df18813842785480d8c5bf35ca28242fc9f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:45:23,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:45:23,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:45:23,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:45:23,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:45:23,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:45:23,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:45:23,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:45:23,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:45:23,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:45:23,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:45:23,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:45:23,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:45:23,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:45:23,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:45:23,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:45:23,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:45:23,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:45:23,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:45:23,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:45:23,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:45:23,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:45:23,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:45:23,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:45:23,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:45:23,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:45:23,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:45:23,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:45:23,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:45:23,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:45:23,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:45:23,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:45:23,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:45:23,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:45:23,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:45:23,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:45:23,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:45:23,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:45:23,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:45:23,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:45:23,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:45:23,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:45:23,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:45:23,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:45:23,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:45:23,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:45:23,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:45:23,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:45:23,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:45:23,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:45:23,630 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:45:23,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:45:23,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:45:23,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:45:23,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:45:23,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:45:23,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:45:23,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:45:23,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:45:23,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:45:23,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:45:23,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:45:23,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:45:23,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:45:23,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:45:23,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:45:23,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:45:23,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:45:23,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:45:23,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:45:23,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:45:23,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:45:23,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:45:23,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:45:23,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:45:23,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:45:23,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c03a342c0e8f0bfba399e237ba210df18813842785480d8c5bf35ca28242fc9f [2021-12-15 09:45:23,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:45:23,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:45:23,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:45:23,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:45:23,926 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:45:23,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label48.c [2021-12-15 09:45:23,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed191da2/3bb4c61633e24b28ae1f76661b77a223/FLAGffe50a7ad [2021-12-15 09:45:24,679 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:45:24,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label48.c [2021-12-15 09:45:24,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed191da2/3bb4c61633e24b28ae1f76661b77a223/FLAGffe50a7ad [2021-12-15 09:45:24,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed191da2/3bb4c61633e24b28ae1f76661b77a223 [2021-12-15 09:45:24,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:45:24,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:45:24,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:45:24,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:45:24,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:45:24,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:45:24" (1/1) ... [2021-12-15 09:45:24,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2612ba6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:24, skipping insertion in model container [2021-12-15 09:45:24,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:45:24" (1/1) ... [2021-12-15 09:45:24,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:45:25,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:45:25,336 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/Problem13_label48.c[1234,1247] [2021-12-15 09:45:26,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:45:26,193 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:45:26,208 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/Problem13_label48.c[1234,1247] [2021-12-15 09:45:26,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:45:26,722 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:45:26,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26 WrapperNode [2021-12-15 09:45:26,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:45:26,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:45:26,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:45:26,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:45:26,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:26,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,312 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:45:27,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:45:27,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:45:27,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:45:27,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:45:27,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:45:27,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:45:27,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:45:27,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:45:27,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (1/1) ... [2021-12-15 09:45:27,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:45:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:27,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:45:27,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:45:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:45:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:45:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:45:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:45:28,087 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:45:28,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:45:32,280 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:45:32,296 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:45:32,297 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:45:32,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:45:32 BoogieIcfgContainer [2021-12-15 09:45:32,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:45:32,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:45:32,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:45:32,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:45:32,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:45:24" (1/3) ... [2021-12-15 09:45:32,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423e297e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:45:32, skipping insertion in model container [2021-12-15 09:45:32,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:26" (2/3) ... [2021-12-15 09:45:32,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423e297e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:45:32, skipping insertion in model container [2021-12-15 09:45:32,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:45:32" (3/3) ... [2021-12-15 09:45:32,311 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label48.c [2021-12-15 09:45:32,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:45:32,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:45:32,361 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:45:32,367 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:45:32,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:45:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 09:45:32,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:32,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 09:45:32,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:32,410 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-12-15 09:45:32,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690478942] [2021-12-15 09:45:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:32,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:32,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690478942] [2021-12-15 09:45:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690478942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:32,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:32,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:32,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184083214] [2021-12-15 09:45:32,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:32,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:32,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:32,566 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:36,388 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-15 09:45:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-15 09:45:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:36,413 INFO L225 Difference]: With dead ends: 3147 [2021-12-15 09:45:36,413 INFO L226 Difference]: Without dead ends: 1964 [2021-12-15 09:45:36,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:36,428 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1173 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:36,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-15 09:45:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-15 09:45:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-15 09:45:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-15 09:45:36,557 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 6 [2021-12-15 09:45:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:36,558 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-15 09:45:36,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-15 09:45:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 09:45:36,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:36,561 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:45:36,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:45:36,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1206914717, now seen corresponding path program 1 times [2021-12-15 09:45:36,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:36,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815882148] [2021-12-15 09:45:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:36,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:36,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815882148] [2021-12-15 09:45:36,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815882148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:36,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:36,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:36,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254528148] [2021-12-15 09:45:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:36,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:36,770 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:40,501 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2021-12-15 09:45:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 09:45:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:40,516 INFO L225 Difference]: With dead ends: 5542 [2021-12-15 09:45:40,516 INFO L226 Difference]: Without dead ends: 3593 [2021-12-15 09:45:40,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:40,521 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:40,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-15 09:45:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-15 09:45:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2021-12-15 09:45:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-15 09:45:40,588 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 77 [2021-12-15 09:45:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:40,589 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-15 09:45:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-15 09:45:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 09:45:40,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:40,595 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:45:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:45:40,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1058751904, now seen corresponding path program 1 times [2021-12-15 09:45:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187736105] [2021-12-15 09:45:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:40,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:40,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187736105] [2021-12-15 09:45:40,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187736105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:40,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:40,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:40,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846421013] [2021-12-15 09:45:40,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:40,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:40,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:40,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:40,757 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:43,820 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-15 09:45:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-15 09:45:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:43,843 INFO L225 Difference]: With dead ends: 10352 [2021-12-15 09:45:43,843 INFO L226 Difference]: Without dead ends: 6773 [2021-12-15 09:45:43,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:43,850 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:43,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:45:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-15 09:45:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-15 09:45:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions. [2021-12-15 09:45:43,962 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 91 [2021-12-15 09:45:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:43,962 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions. [2021-12-15 09:45:43,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions. [2021-12-15 09:45:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 09:45:43,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:43,965 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:45:43,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:45:43,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -353663974, now seen corresponding path program 1 times [2021-12-15 09:45:43,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:43,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540411165] [2021-12-15 09:45:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:43,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:44,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:44,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540411165] [2021-12-15 09:45:44,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540411165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:44,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:44,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:44,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473588377] [2021-12-15 09:45:44,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:44,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:44,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:44,107 INFO L87 Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:47,438 INFO L93 Difference]: Finished difference Result 19873 states and 26320 transitions. [2021-12-15 09:45:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-15 09:45:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:47,477 INFO L225 Difference]: With dead ends: 19873 [2021-12-15 09:45:47,478 INFO L226 Difference]: Without dead ends: 13126 [2021-12-15 09:45:47,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:47,487 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 901 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:47,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 608 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 2878 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:45:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13126 states. [2021-12-15 09:45:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13126 to 13114. [2021-12-15 09:45:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13114 states, 13113 states have (on average 1.2756806222832304) internal successors, (16728), 13113 states have internal predecessors, (16728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 16728 transitions. [2021-12-15 09:45:47,765 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 16728 transitions. Word has length 120 [2021-12-15 09:45:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:47,767 INFO L470 AbstractCegarLoop]: Abstraction has 13114 states and 16728 transitions. [2021-12-15 09:45:47,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 16728 transitions. [2021-12-15 09:45:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-15 09:45:47,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:47,779 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:47,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:45:47,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1099402105, now seen corresponding path program 1 times [2021-12-15 09:45:47,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:47,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938407830] [2021-12-15 09:45:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:47,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:45:47,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938407830] [2021-12-15 09:45:47,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938407830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:47,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:47,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:47,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798804472] [2021-12-15 09:45:47,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:47,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:47,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:47,929 INFO L87 Difference]: Start difference. First operand 13114 states and 16728 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:50,582 INFO L93 Difference]: Finished difference Result 25439 states and 32642 transitions. [2021-12-15 09:45:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 198 [2021-12-15 09:45:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:50,615 INFO L225 Difference]: With dead ends: 25439 [2021-12-15 09:45:50,616 INFO L226 Difference]: Without dead ends: 13114 [2021-12-15 09:45:50,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:50,629 INFO L933 BasicCegarLoop]: 1085 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:50,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1214 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:45:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2021-12-15 09:45:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13114. [2021-12-15 09:45:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13114 states, 13113 states have (on average 1.2745367192862045) internal successors, (16713), 13113 states have internal predecessors, (16713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 16713 transitions. [2021-12-15 09:45:50,830 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 16713 transitions. Word has length 198 [2021-12-15 09:45:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:50,831 INFO L470 AbstractCegarLoop]: Abstraction has 13114 states and 16713 transitions. [2021-12-15 09:45:50,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 16713 transitions. [2021-12-15 09:45:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-15 09:45:50,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:50,838 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:50,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:45:50,838 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash 444591296, now seen corresponding path program 1 times [2021-12-15 09:45:50,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:50,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81002759] [2021-12-15 09:45:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:50,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:51,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:51,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81002759] [2021-12-15 09:45:51,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81002759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:51,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:51,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:51,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196138861] [2021-12-15 09:45:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:51,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:51,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:51,033 INFO L87 Difference]: Start difference. First operand 13114 states and 16713 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:56,923 INFO L93 Difference]: Finished difference Result 45404 states and 59028 transitions. [2021-12-15 09:45:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-12-15 09:45:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:56,989 INFO L225 Difference]: With dead ends: 45404 [2021-12-15 09:45:56,990 INFO L226 Difference]: Without dead ends: 33079 [2021-12-15 09:45:57,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:57,010 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 1624 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 6121 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 6745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 6121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:57,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 1154 Invalid, 6745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 6121 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 09:45:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33079 states. [2021-12-15 09:45:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33079 to 32857. [2021-12-15 09:45:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32857 states, 32856 states have (on average 1.2319515461407353) internal successors, (40477), 32856 states have internal predecessors, (40477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32857 states to 32857 states and 40477 transitions. [2021-12-15 09:45:57,593 INFO L78 Accepts]: Start accepts. Automaton has 32857 states and 40477 transitions. Word has length 203 [2021-12-15 09:45:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:57,594 INFO L470 AbstractCegarLoop]: Abstraction has 32857 states and 40477 transitions. [2021-12-15 09:45:57,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 32857 states and 40477 transitions. [2021-12-15 09:45:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:45:57,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:57,597 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:57,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:45:57,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:57,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1697226734, now seen corresponding path program 1 times [2021-12-15 09:45:57,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:57,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887698054] [2021-12-15 09:45:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:57,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:57,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:57,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887698054] [2021-12-15 09:45:57,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887698054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:57,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:57,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:57,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793215714] [2021-12-15 09:45:57,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:57,846 INFO L87 Difference]: Start difference. First operand 32857 states and 40477 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:01,172 INFO L93 Difference]: Finished difference Result 79898 states and 100681 transitions. [2021-12-15 09:46:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2021-12-15 09:46:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:01,244 INFO L225 Difference]: With dead ends: 79898 [2021-12-15 09:46:01,244 INFO L226 Difference]: Without dead ends: 47830 [2021-12-15 09:46:01,271 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 [2021-12-15 09:46:01,272 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 836 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 891 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:01,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1057 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:46:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47830 states. [2021-12-15 09:46:01,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47830 to 47818. [2021-12-15 09:46:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47818 states, 47817 states have (on average 1.2138569964656922) internal successors, (58043), 47817 states have internal predecessors, (58043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47818 states to 47818 states and 58043 transitions. [2021-12-15 09:46:01,881 INFO L78 Accepts]: Start accepts. Automaton has 47818 states and 58043 transitions. Word has length 205 [2021-12-15 09:46:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:01,882 INFO L470 AbstractCegarLoop]: Abstraction has 47818 states and 58043 transitions. [2021-12-15 09:46:01,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 47818 states and 58043 transitions. [2021-12-15 09:46:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-15 09:46:01,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:01,891 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:01,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:46:01,891 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -574783061, now seen corresponding path program 1 times [2021-12-15 09:46:01,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:01,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621623465] [2021-12-15 09:46:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:01,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:01,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:01,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621623465] [2021-12-15 09:46:01,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621623465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:01,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:01,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:01,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575392119] [2021-12-15 09:46:01,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:01,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:01,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:01,991 INFO L87 Difference]: Start difference. First operand 47818 states and 58043 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:05,029 INFO L93 Difference]: Finished difference Result 94662 states and 115031 transitions. [2021-12-15 09:46:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-12-15 09:46:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:05,093 INFO L225 Difference]: With dead ends: 94662 [2021-12-15 09:46:05,094 INFO L226 Difference]: Without dead ends: 47633 [2021-12-15 09:46:05,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:05,123 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 1038 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:05,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1649 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:46:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47633 states. [2021-12-15 09:46:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47633 to 47627. [2021-12-15 09:46:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47627 states, 47626 states have (on average 1.1450048292949229) internal successors, (54532), 47626 states have internal predecessors, (54532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47627 states to 47627 states and 54532 transitions. [2021-12-15 09:46:05,740 INFO L78 Accepts]: Start accepts. Automaton has 47627 states and 54532 transitions. Word has length 220 [2021-12-15 09:46:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:05,743 INFO L470 AbstractCegarLoop]: Abstraction has 47627 states and 54532 transitions. [2021-12-15 09:46:05,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 47627 states and 54532 transitions. [2021-12-15 09:46:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-15 09:46:05,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:05,747 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:05,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:46:05,748 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1328271267, now seen corresponding path program 1 times [2021-12-15 09:46:05,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:05,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482317859] [2021-12-15 09:46:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:05,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 09:46:05,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:05,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482317859] [2021-12-15 09:46:05,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482317859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:05,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:05,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:46:05,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876183861] [2021-12-15 09:46:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:05,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:05,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:05,885 INFO L87 Difference]: Start difference. First operand 47627 states and 54532 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:09,397 INFO L93 Difference]: Finished difference Result 125936 states and 145248 transitions. [2021-12-15 09:46:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:09,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 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 236 [2021-12-15 09:46:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:09,495 INFO L225 Difference]: With dead ends: 125936 [2021-12-15 09:46:09,495 INFO L226 Difference]: Without dead ends: 79098 [2021-12-15 09:46:09,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:09,527 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 845 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:09,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 981 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:46:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79098 states. [2021-12-15 09:46:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79098 to 73582. [2021-12-15 09:46:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73582 states, 73581 states have (on average 1.1190117013903045) internal successors, (82338), 73581 states have internal predecessors, (82338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73582 states to 73582 states and 82338 transitions. [2021-12-15 09:46:10,503 INFO L78 Accepts]: Start accepts. Automaton has 73582 states and 82338 transitions. Word has length 236 [2021-12-15 09:46:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:10,504 INFO L470 AbstractCegarLoop]: Abstraction has 73582 states and 82338 transitions. [2021-12-15 09:46:10,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 73582 states and 82338 transitions. [2021-12-15 09:46:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-15 09:46:10,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:10,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:10,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:46:10,509 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:10,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1234424984, now seen corresponding path program 1 times [2021-12-15 09:46:10,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:10,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737600937] [2021-12-15 09:46:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:10,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:46:10,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737600937] [2021-12-15 09:46:10,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737600937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:10,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:10,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:10,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233045607] [2021-12-15 09:46:10,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:10,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:10,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:10,614 INFO L87 Difference]: Start difference. First operand 73582 states and 82338 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:14,425 INFO L93 Difference]: Finished difference Result 166846 states and 188461 transitions. [2021-12-15 09:46:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-12-15 09:46:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:14,555 INFO L225 Difference]: With dead ends: 166846 [2021-12-15 09:46:14,555 INFO L226 Difference]: Without dead ends: 94053 [2021-12-15 09:46:14,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:14,588 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 862 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:14,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1918 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:46:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94053 states. [2021-12-15 09:46:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94053 to 93261. [2021-12-15 09:46:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93261 states, 93260 states have (on average 1.1034634355565087) internal successors, (102909), 93260 states have internal predecessors, (102909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93261 states to 93261 states and 102909 transitions. [2021-12-15 09:46:15,676 INFO L78 Accepts]: Start accepts. Automaton has 93261 states and 102909 transitions. Word has length 294 [2021-12-15 09:46:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 93261 states and 102909 transitions. [2021-12-15 09:46:15,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 93261 states and 102909 transitions. [2021-12-15 09:46:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-15 09:46:15,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:15,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:46:15,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:46:15,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1183955086, now seen corresponding path program 1 times [2021-12-15 09:46:15,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:15,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585919433] [2021-12-15 09:46:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:15,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:46:15,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:15,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585919433] [2021-12-15 09:46:15,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585919433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:15,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:15,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:15,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358107629] [2021-12-15 09:46:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:15,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:46:15,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:46:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:46:15,788 INFO L87 Difference]: Start difference. First operand 93261 states and 102909 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)