./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label02.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/Problem15_label02.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 252caf568f55ccc117f08f171449ba48170f0a66dff72163b7ceb4914a3f7685 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:49:10,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:49:10,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:49:10,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:49:10,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:49:10,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:49:10,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:49:10,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:49:10,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:49:10,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:49:10,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:49:10,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:49:10,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:49:10,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:49:10,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:49:10,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:49:10,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:49:10,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:49:10,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:49:10,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:49:10,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:49:10,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:49:10,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:49:10,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:49:10,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:49:10,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:49:10,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:49:10,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:49:10,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:49:10,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:49:10,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:49:10,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:49:10,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:49:10,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:49:10,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:49:10,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:49:10,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:49:10,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:49:10,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:49:10,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:49:10,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:49:10,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:49:10,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:49:10,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:49:10,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:49:10,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:49:10,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:49:10,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:49:10,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:49:10,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:49:10,288 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:49:10,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:49:10,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:49:10,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:49:10,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:49:10,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:49:10,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:49:10,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:49:10,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:49:10,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:49:10,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:49:10,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:49:10,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:49:10,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:49:10,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:49:10,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:49:10,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:49:10,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:49:10,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:49:10,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:49:10,293 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 252caf568f55ccc117f08f171449ba48170f0a66dff72163b7ceb4914a3f7685 [2021-12-15 09:49:10,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:49:10,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:49:10,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:49:10,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:49:10,525 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:49:10,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label02.c [2021-12-15 09:49:10,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b9d81d6b/d89911eafbd84b158dba058fc5df437a/FLAGd241ce664 [2021-12-15 09:49:11,094 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:49:11,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label02.c [2021-12-15 09:49:11,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b9d81d6b/d89911eafbd84b158dba058fc5df437a/FLAGd241ce664 [2021-12-15 09:49:11,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b9d81d6b/d89911eafbd84b158dba058fc5df437a [2021-12-15 09:49:11,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:49:11,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:49:11,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:49:11,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:49:11,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:49:11,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:49:11" (1/1) ... [2021-12-15 09:49:11,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f9f42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:11, skipping insertion in model container [2021-12-15 09:49:11,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:49:11" (1/1) ... [2021-12-15 09:49:11,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:49:11,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:49:11,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label02.c[3558,3571] [2021-12-15 09:49:12,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:49:12,126 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:49:12,137 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label02.c[3558,3571] [2021-12-15 09:49:12,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:49:12,277 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:49:12,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12 WrapperNode [2021-12-15 09:49:12,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:49:12,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:49:12,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:49:12,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:49:12,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,447 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 09:49:12,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:49:12,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:49:12,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:49:12,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:49:12,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:49:12,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:49:12,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:49:12,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:49:12,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (1/1) ... [2021-12-15 09:49:12,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:49:12,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:49:12,612 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 09:49:12,628 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 09:49:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:49:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:49:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:49:12,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:49:12,678 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:49:12,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:49:14,549 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:49:14,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:49:14,556 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:49:14,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:49:14 BoogieIcfgContainer [2021-12-15 09:49:14,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:49:14,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:49:14,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:49:14,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:49:14,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:49:11" (1/3) ... [2021-12-15 09:49:14,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de75cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:49:14, skipping insertion in model container [2021-12-15 09:49:14,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:49:12" (2/3) ... [2021-12-15 09:49:14,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de75cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:49:14, skipping insertion in model container [2021-12-15 09:49:14,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:49:14" (3/3) ... [2021-12-15 09:49:14,564 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label02.c [2021-12-15 09:49:14,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:49:14,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:49:14,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:49:14,601 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 09:49:14,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:49:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 09:49:14,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:14,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:49:14,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-12-15 09:49:14,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:14,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509908267] [2021-12-15 09:49:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:14,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:14,812 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 09:49:14,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509908267] [2021-12-15 09:49:14,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509908267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:14,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:14,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:49:14,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939335969] [2021-12-15 09:49:14,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:14,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:14,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:14,841 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 09:49:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:16,588 INFO L93 Difference]: Finished difference Result 1191 states and 2157 transitions. [2021-12-15 09:49:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-12-15 09:49:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:16,601 INFO L225 Difference]: With dead ends: 1191 [2021-12-15 09:49:16,602 INFO L226 Difference]: Without dead ends: 688 [2021-12-15 09:49:16,605 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 09:49:16,609 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 343 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:16,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 230 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:49:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-15 09:49:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 680. [2021-12-15 09:49:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.609720176730486) internal successors, (1093), 679 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1093 transitions. [2021-12-15 09:49:16,663 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1093 transitions. Word has length 28 [2021-12-15 09:49:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:16,663 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1093 transitions. [2021-12-15 09:49:16,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 09:49:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1093 transitions. [2021-12-15 09:49:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 09:49:16,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:16,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:16,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:49:16,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1168160975, now seen corresponding path program 1 times [2021-12-15 09:49:16,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:16,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856098555] [2021-12-15 09:49:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:16,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:16,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856098555] [2021-12-15 09:49:16,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856098555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:16,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:16,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:49:16,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732448929] [2021-12-15 09:49:16,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:16,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:16,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:16,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:16,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:16,771 INFO L87 Difference]: Start difference. First operand 680 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:17,917 INFO L93 Difference]: Finished difference Result 1964 states and 3171 transitions. [2021-12-15 09:49:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 09:49:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:17,922 INFO L225 Difference]: With dead ends: 1964 [2021-12-15 09:49:17,922 INFO L226 Difference]: Without dead ends: 1286 [2021-12-15 09:49:17,924 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 09:49:17,924 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 282 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:17,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 360 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:49:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-12-15 09:49:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1281. [2021-12-15 09:49:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 1.3953125) internal successors, (1786), 1280 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1786 transitions. [2021-12-15 09:49:17,966 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1786 transitions. Word has length 96 [2021-12-15 09:49:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:17,967 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1786 transitions. [2021-12-15 09:49:17,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1786 transitions. [2021-12-15 09:49:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 09:49:17,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:17,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:17,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:49:17,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash -996245475, now seen corresponding path program 1 times [2021-12-15 09:49:17,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:17,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434851594] [2021-12-15 09:49:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:17,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:18,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434851594] [2021-12-15 09:49:18,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434851594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:18,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:18,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:49:18,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765134926] [2021-12-15 09:49:18,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:18,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:18,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:18,063 INFO L87 Difference]: Start difference. First operand 1281 states and 1786 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 09:49:19,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:19,356 INFO L93 Difference]: Finished difference Result 3766 states and 5246 transitions. [2021-12-15 09:49:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-12-15 09:49:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:19,363 INFO L225 Difference]: With dead ends: 3766 [2021-12-15 09:49:19,363 INFO L226 Difference]: Without dead ends: 2487 [2021-12-15 09:49:19,365 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 09:49:19,366 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 300 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:19,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:49:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-12-15 09:49:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2487. [2021-12-15 09:49:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.244569589702333) internal successors, (3094), 2486 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3094 transitions. [2021-12-15 09:49:19,397 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3094 transitions. Word has length 104 [2021-12-15 09:49:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3094 transitions. [2021-12-15 09:49:19,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 09:49:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3094 transitions. [2021-12-15 09:49:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 09:49:19,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:19,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:19,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:49:19,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash 165774961, now seen corresponding path program 1 times [2021-12-15 09:49:19,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:19,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235554383] [2021-12-15 09:49:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:19,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:19,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235554383] [2021-12-15 09:49:19,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235554383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:19,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:19,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:49:19,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658375480] [2021-12-15 09:49:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:19,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:19,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:19,470 INFO L87 Difference]: Start difference. First operand 2487 states and 3094 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:20,777 INFO L93 Difference]: Finished difference Result 6173 states and 7859 transitions. [2021-12-15 09:49:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 09:49:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:20,790 INFO L225 Difference]: With dead ends: 6173 [2021-12-15 09:49:20,790 INFO L226 Difference]: Without dead ends: 3688 [2021-12-15 09:49:20,792 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 09:49:20,793 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 234 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:20,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 363 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:49:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2021-12-15 09:49:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3686. [2021-12-15 09:49:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3685 states have (on average 1.198100407055631) internal successors, (4415), 3685 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states 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 09:49:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 4415 transitions. [2021-12-15 09:49:20,837 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 4415 transitions. Word has length 110 [2021-12-15 09:49:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:20,838 INFO L470 AbstractCegarLoop]: Abstraction has 3686 states and 4415 transitions. [2021-12-15 09:49:20,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 4415 transitions. [2021-12-15 09:49:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 09:49:20,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:20,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:20,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:49:20,841 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash 393462226, now seen corresponding path program 1 times [2021-12-15 09:49:20,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:20,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983316547] [2021-12-15 09:49:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:20,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:20,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983316547] [2021-12-15 09:49:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983316547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:20,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:20,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:49:20,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347313206] [2021-12-15 09:49:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:20,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:20,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:20,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:20,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:20,969 INFO L87 Difference]: Start difference. First operand 3686 states and 4415 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:22,168 INFO L93 Difference]: Finished difference Result 8572 states and 10503 transitions. [2021-12-15 09:49:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-12-15 09:49:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:22,188 INFO L225 Difference]: With dead ends: 8572 [2021-12-15 09:49:22,188 INFO L226 Difference]: Without dead ends: 4888 [2021-12-15 09:49:22,191 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 09:49:22,192 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 300 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:22,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 614 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:49:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2021-12-15 09:49:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 4886. [2021-12-15 09:49:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4886 states, 4885 states have (on average 1.1733879222108496) internal successors, (5732), 4885 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states 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 09:49:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4886 states to 4886 states and 5732 transitions. [2021-12-15 09:49:22,240 INFO L78 Accepts]: Start accepts. Automaton has 4886 states and 5732 transitions. Word has length 224 [2021-12-15 09:49:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:22,240 INFO L470 AbstractCegarLoop]: Abstraction has 4886 states and 5732 transitions. [2021-12-15 09:49:22,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:49:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4886 states and 5732 transitions. [2021-12-15 09:49:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-15 09:49:22,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:22,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:49:22,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:49:22,243 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1062253043, now seen corresponding path program 1 times [2021-12-15 09:49:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684673632] [2021-12-15 09:49:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:22,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:49:22,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:22,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684673632] [2021-12-15 09:49:22,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684673632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:22,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:22,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:49:22,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680344378] [2021-12-15 09:49:22,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:22,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:22,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:22,394 INFO L87 Difference]: Start difference. First operand 4886 states and 5732 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 09:49:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:23,554 INFO L93 Difference]: Finished difference Result 10069 states and 11773 transitions. [2021-12-15 09:49:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 289 [2021-12-15 09:49:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:23,568 INFO L225 Difference]: With dead ends: 10069 [2021-12-15 09:49:23,568 INFO L226 Difference]: Without dead ends: 5185 [2021-12-15 09:49:23,572 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 09:49:23,574 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:23,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:49:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-12-15 09:49:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 5185. [2021-12-15 09:49:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 5184 states have (on average 1.1645447530864197) internal successors, (6037), 5184 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states 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 09:49:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 6037 transitions. [2021-12-15 09:49:23,629 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 6037 transitions. Word has length 289 [2021-12-15 09:49:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:23,629 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 6037 transitions. [2021-12-15 09:49:23,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 09:49:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 6037 transitions. [2021-12-15 09:49:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-15 09:49:23,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:23,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:23,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:49:23,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1262552474, now seen corresponding path program 1 times [2021-12-15 09:49:23,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:23,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369737338] [2021-12-15 09:49:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:23,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:23,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369737338] [2021-12-15 09:49:23,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369737338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:23,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:49:23,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:49:23,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814980002] [2021-12-15 09:49:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:23,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:23,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:49:23,740 INFO L87 Difference]: Start difference. First operand 5185 states and 6037 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 09:49:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:25,158 INFO L93 Difference]: Finished difference Result 11271 states and 13444 transitions. [2021-12-15 09:49:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 310 [2021-12-15 09:49:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:25,174 INFO L225 Difference]: With dead ends: 11271 [2021-12-15 09:49:25,174 INFO L226 Difference]: Without dead ends: 6387 [2021-12-15 09:49:25,180 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 09:49:25,185 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 301 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:25,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 623 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:49:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2021-12-15 09:49:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 6382. [2021-12-15 09:49:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 1.1548346654129447) internal successors, (7369), 6381 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states 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 09:49:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 7369 transitions. [2021-12-15 09:49:25,270 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 7369 transitions. Word has length 310 [2021-12-15 09:49:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:25,271 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 7369 transitions. [2021-12-15 09:49:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 09:49:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 7369 transitions. [2021-12-15 09:49:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-15 09:49:25,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:25,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:49:25,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:49:25,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1845872633, now seen corresponding path program 1 times [2021-12-15 09:49:25,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:25,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684369273] [2021-12-15 09:49:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:25,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:25,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684369273] [2021-12-15 09:49:25,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684369273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309444964] [2021-12-15 09:49:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:25,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:49:25,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:49:25,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:49:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 09:49:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:49:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:26,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:49:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:27,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309444964] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:27,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:49:27,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-12-15 09:49:27,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985548741] [2021-12-15 09:49:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:27,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:49:27,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:49:27,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:49:27,267 INFO L87 Difference]: Start difference. First operand 6382 states and 7369 transitions. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 09:49:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:29,643 INFO L93 Difference]: Finished difference Result 18479 states and 21606 transitions. [2021-12-15 09:49:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:49:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 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 375 [2021-12-15 09:49:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:29,666 INFO L225 Difference]: With dead ends: 18479 [2021-12-15 09:49:29,666 INFO L226 Difference]: Without dead ends: 12398 [2021-12-15 09:49:29,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:49:29,673 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 605 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:29,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 91 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:49:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12398 states. [2021-12-15 09:49:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12398 to 10274. [2021-12-15 09:49:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10274 states, 10273 states have (on average 1.1915701353061423) internal successors, (12241), 10273 states have internal predecessors, (12241), 0 states have call successors, (0), 0 states 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 09:49:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10274 states to 10274 states and 12241 transitions. [2021-12-15 09:49:29,812 INFO L78 Accepts]: Start accepts. Automaton has 10274 states and 12241 transitions. Word has length 375 [2021-12-15 09:49:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:29,812 INFO L470 AbstractCegarLoop]: Abstraction has 10274 states and 12241 transitions. [2021-12-15 09:49:29,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 09:49:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 10274 states and 12241 transitions. [2021-12-15 09:49:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-12-15 09:49:29,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:29,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:29,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:49:30,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:30,035 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2108122715, now seen corresponding path program 1 times [2021-12-15 09:49:30,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:30,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878899233] [2021-12-15 09:49:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:30,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 52 proven. 175 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-15 09:49:30,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:30,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878899233] [2021-12-15 09:49:30,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878899233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361969578] [2021-12-15 09:49:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:30,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:49:30,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:49:30,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:49:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:49:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:49:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:49:30,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:49:30,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361969578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:49:30,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:49:30,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:49:30,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690175712] [2021-12-15 09:49:30,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:30,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:49:30,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:49:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:49:30,946 INFO L87 Difference]: Start difference. First operand 10274 states and 12241 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 09:49:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:32,393 INFO L93 Difference]: Finished difference Result 25031 states and 30115 transitions. [2021-12-15 09:49:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:49:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 479 [2021-12-15 09:49:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:32,414 INFO L225 Difference]: With dead ends: 25031 [2021-12-15 09:49:32,414 INFO L226 Difference]: Without dead ends: 15058 [2021-12-15 09:49:32,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:49:32,423 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 148 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:32,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 315 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:49:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15058 states. [2021-12-15 09:49:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15058 to 13264. [2021-12-15 09:49:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 13263 states have (on average 1.172811581090251) internal successors, (15555), 13263 states have internal predecessors, (15555), 0 states have call successors, (0), 0 states 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 09:49:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 15555 transitions. [2021-12-15 09:49:32,619 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 15555 transitions. Word has length 479 [2021-12-15 09:49:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 15555 transitions. [2021-12-15 09:49:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 09:49:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 15555 transitions. [2021-12-15 09:49:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-12-15 09:49:32,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:32,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:32,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:49:32,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 09:49:32,842 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -908400451, now seen corresponding path program 1 times [2021-12-15 09:49:32,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:32,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673772114] [2021-12-15 09:49:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:32,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 26 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:33,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673772114] [2021-12-15 09:49:33,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673772114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098513461] [2021-12-15 09:49:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:33,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:33,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:49:33,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:49:33,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:49:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:33,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:49:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:49:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 204 proven. 106 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:49:34,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:49:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 204 proven. 106 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:49:36,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098513461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:49:36,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:49:36,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2021-12-15 09:49:36,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740744333] [2021-12-15 09:49:36,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:49:36,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:49:36,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:49:36,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:49:36,881 INFO L87 Difference]: Start difference. First operand 13264 states and 15555 transitions. Second operand has 9 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 09:49:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:47,999 INFO L93 Difference]: Finished difference Result 64035 states and 73510 transitions. [2021-12-15 09:49:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 09:49:48,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 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 482 [2021-12-15 09:49:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:48,070 INFO L225 Difference]: With dead ends: 64035 [2021-12-15 09:49:48,070 INFO L226 Difference]: Without dead ends: 51072 [2021-12-15 09:49:48,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-12-15 09:49:48,085 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 5228 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 7591 mSolverCounterSat, 2930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5228 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 10521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2930 IncrementalHoareTripleChecker+Valid, 7591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:48,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5228 Valid, 252 Invalid, 10521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2930 Valid, 7591 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2021-12-15 09:49:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51072 states. [2021-12-15 09:49:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51072 to 40508. [2021-12-15 09:49:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40508 states, 40507 states have (on average 1.1425185770360677) internal successors, (46280), 40507 states have internal predecessors, (46280), 0 states have call successors, (0), 0 states 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 09:49:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40508 states to 40508 states and 46280 transitions. [2021-12-15 09:49:48,596 INFO L78 Accepts]: Start accepts. Automaton has 40508 states and 46280 transitions. Word has length 482 [2021-12-15 09:49:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:48,597 INFO L470 AbstractCegarLoop]: Abstraction has 40508 states and 46280 transitions. [2021-12-15 09:49:48,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 09:49:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40508 states and 46280 transitions. [2021-12-15 09:49:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-12-15 09:49:48,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:48,602 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:48,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:49:48,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:48,818 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash 332439731, now seen corresponding path program 1 times [2021-12-15 09:49:48,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:48,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298305418] [2021-12-15 09:49:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:48,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 312 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:49:48,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298305418] [2021-12-15 09:49:48,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298305418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453302253] [2021-12-15 09:49:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:48,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:49:48,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:49:48,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:49:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:49,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:49:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:49:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 312 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:49:50,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:49:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 312 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:49:51,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453302253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:49:51,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:49:51,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 09:49:51,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453386799] [2021-12-15 09:49:51,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:49:51,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:49:51,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:49:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:49:51,128 INFO L87 Difference]: Start difference. First operand 40508 states and 46280 transitions. Second operand has 9 states, 9 states have (on average 83.44444444444444) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states 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 09:49:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:49:55,895 INFO L93 Difference]: Finished difference Result 84468 states and 95951 transitions. [2021-12-15 09:49:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 09:49:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.44444444444444) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 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 488 [2021-12-15 09:49:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:49:55,990 INFO L225 Difference]: With dead ends: 84468 [2021-12-15 09:49:55,990 INFO L226 Difference]: Without dead ends: 30936 [2021-12-15 09:49:56,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-15 09:49:56,008 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2951 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 5290 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2951 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 6055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 5290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:49:56,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2951 Valid, 237 Invalid, 6055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 5290 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 09:49:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30936 states. [2021-12-15 09:49:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30936 to 21343. [2021-12-15 09:49:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21343 states, 21342 states have (on average 1.073751288539031) internal successors, (22916), 21342 states have internal predecessors, (22916), 0 states have call successors, (0), 0 states 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 09:49:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21343 states to 21343 states and 22916 transitions. [2021-12-15 09:49:56,295 INFO L78 Accepts]: Start accepts. Automaton has 21343 states and 22916 transitions. Word has length 488 [2021-12-15 09:49:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:49:56,295 INFO L470 AbstractCegarLoop]: Abstraction has 21343 states and 22916 transitions. [2021-12-15 09:49:56,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.44444444444444) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states 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 09:49:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21343 states and 22916 transitions. [2021-12-15 09:49:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-15 09:49:56,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:49:56,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:56,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:49:56,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:56,511 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:49:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:49:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1193169409, now seen corresponding path program 1 times [2021-12-15 09:49:56,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:49:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099942322] [2021-12-15 09:49:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:56,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:49:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 77 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:56,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:49:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099942322] [2021-12-15 09:49:56,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099942322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088502470] [2021-12-15 09:49:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:49:56,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:49:56,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:49:56,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:49:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:49:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:49:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:49:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:49:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 26 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:57,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:49:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:49:58,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088502470] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:49:58,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:49:58,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2021-12-15 09:49:58,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123517871] [2021-12-15 09:49:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:49:58,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:49:58,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:49:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:49:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=83, Unknown=0, NotChecked=0, Total=156 [2021-12-15 09:49:58,707 INFO L87 Difference]: Start difference. First operand 21343 states and 22916 transitions. Second operand has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 09:50:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:00,210 INFO L93 Difference]: Finished difference Result 45393 states and 48670 transitions. [2021-12-15 09:50:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:50:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 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 494 [2021-12-15 09:50:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:00,237 INFO L225 Difference]: With dead ends: 45393 [2021-12-15 09:50:00,238 INFO L226 Difference]: Without dead ends: 24052 [2021-12-15 09:50:00,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 991 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=83, Unknown=0, NotChecked=0, Total=156 [2021-12-15 09:50:00,253 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1069 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:00,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 78 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:50:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24052 states. [2021-12-15 09:50:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24052 to 21044. [2021-12-15 09:50:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21044 states, 21043 states have (on average 1.0743240032314785) internal successors, (22607), 21043 states have internal predecessors, (22607), 0 states have call successors, (0), 0 states 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 09:50:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21044 states to 21044 states and 22607 transitions. [2021-12-15 09:50:00,455 INFO L78 Accepts]: Start accepts. Automaton has 21044 states and 22607 transitions. Word has length 494 [2021-12-15 09:50:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:00,456 INFO L470 AbstractCegarLoop]: Abstraction has 21044 states and 22607 transitions. [2021-12-15 09:50:00,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 09:50:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 21044 states and 22607 transitions. [2021-12-15 09:50:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-12-15 09:50:00,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:00,461 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:50:00,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:50:00,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:50:00,667 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash -260242563, now seen corresponding path program 1 times [2021-12-15 09:50:00,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:00,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340482249] [2021-12-15 09:50:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:00,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 78 proven. 292 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-12-15 09:50:00,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:00,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340482249] [2021-12-15 09:50:00,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340482249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:00,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115591543] [2021-12-15 09:50:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:00,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:00,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:00,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:50:00,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:50:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:01,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:50:01,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-12-15 09:50:01,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:50:01,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115591543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:01,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:50:01,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:50:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919475538] [2021-12-15 09:50:01,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:01,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:01,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:01,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:50:01,636 INFO L87 Difference]: Start difference. First operand 21044 states and 22607 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:02,480 INFO L93 Difference]: Finished difference Result 41784 states and 44894 transitions. [2021-12-15 09:50:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:02,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 582 [2021-12-15 09:50:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:02,501 INFO L225 Difference]: With dead ends: 41784 [2021-12-15 09:50:02,501 INFO L226 Difference]: Without dead ends: 20742 [2021-12-15 09:50:02,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:50:02,514 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 302 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:02,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 517 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:50:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20742 states. [2021-12-15 09:50:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20742 to 20740. [2021-12-15 09:50:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20740 states, 20739 states have (on average 1.0436375910121027) internal successors, (21644), 20739 states have internal predecessors, (21644), 0 states have call successors, (0), 0 states 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 09:50:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20740 states to 20740 states and 21644 transitions. [2021-12-15 09:50:02,749 INFO L78 Accepts]: Start accepts. Automaton has 20740 states and 21644 transitions. Word has length 582 [2021-12-15 09:50:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:02,749 INFO L470 AbstractCegarLoop]: Abstraction has 20740 states and 21644 transitions. [2021-12-15 09:50:02,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20740 states and 21644 transitions. [2021-12-15 09:50:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-12-15 09:50:02,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:02,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:02,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:50:02,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:02,971 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1767528899, now seen corresponding path program 1 times [2021-12-15 09:50:02,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838082836] [2021-12-15 09:50:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:02,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-12-15 09:50:03,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:03,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838082836] [2021-12-15 09:50:03,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838082836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:03,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:03,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:03,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482152024] [2021-12-15 09:50:03,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:03,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:50:03,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:50:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:50:03,156 INFO L87 Difference]: Start difference. First operand 20740 states and 21644 transitions. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 09:50:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:04,606 INFO L93 Difference]: Finished difference Result 60101 states and 62753 transitions. [2021-12-15 09:50:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:50:04,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 667 [2021-12-15 09:50:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:04,645 INFO L225 Difference]: With dead ends: 60101 [2021-12-15 09:50:04,645 INFO L226 Difference]: Without dead ends: 39662 [2021-12-15 09:50:04,661 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 09:50:04,662 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 630 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:04,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 152 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:50:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39662 states. [2021-12-15 09:50:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39662 to 35463. [2021-12-15 09:50:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35463 states, 35462 states have (on average 1.0431729738875415) internal successors, (36993), 35462 states have internal predecessors, (36993), 0 states have call successors, (0), 0 states 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 09:50:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35463 states to 35463 states and 36993 transitions. [2021-12-15 09:50:05,069 INFO L78 Accepts]: Start accepts. Automaton has 35463 states and 36993 transitions. Word has length 667 [2021-12-15 09:50:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 35463 states and 36993 transitions. [2021-12-15 09:50:05,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 09:50:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 35463 states and 36993 transitions. [2021-12-15 09:50:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2021-12-15 09:50:05,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:05,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:05,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:50:05,078 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash -293463254, now seen corresponding path program 1 times [2021-12-15 09:50:05,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:05,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095299687] [2021-12-15 09:50:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:05,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 77 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:05,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:05,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095299687] [2021-12-15 09:50:05,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095299687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:05,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399194893] [2021-12-15 09:50:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:05,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:05,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:50:05,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:50:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:05,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 09:50:05,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 25 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:07,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:50:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 435 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:10,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399194893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:50:10,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:50:10,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-15 09:50:10,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680855284] [2021-12-15 09:50:10,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:50:10,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 09:50:10,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 09:50:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-12-15 09:50:10,150 INFO L87 Difference]: Start difference. First operand 35463 states and 36993 transitions. Second operand has 13 states, 13 states have (on average 132.53846153846155) internal successors, (1723), 12 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)