./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label41.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/Problem19_label41.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 3747ef8755485569a0a339d6156dc01dce1d2f7e5665f5f439668d3f5ee386b0 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:08:41,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:08:41,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:08:41,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:08:41,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:08:41,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:08:41,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:08:41,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:08:41,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:08:41,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:08:41,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:08:41,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:08:41,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:08:41,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:08:41,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:08:41,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:08:41,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:08:41,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:08:41,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:08:41,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:08:41,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:08:41,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:08:41,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:08:41,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:08:41,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:08:41,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:08:41,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:08:41,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:08:41,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:08:41,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:08:41,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:08:41,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:08:41,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:08:41,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:08:41,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:08:41,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:08:41,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:08:41,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:08:41,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:08:41,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:08:41,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:08:41,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:08:41,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:08:41,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:08:41,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:08:41,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:08:41,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:08:41,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:08:41,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:08:41,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:08:41,477 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:08:41,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:08:41,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:08:41,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:08:41,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:08:41,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:08:41,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:08:41,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:08:41,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:08:41,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:08:41,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:08:41,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:08:41,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:08:41,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:08:41,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:08:41,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:08:41,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:08:41,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:08:41,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:08:41,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:08:41,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:08:41,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:08:41,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:08:41,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:08:41,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:08:41,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:08:41,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3747ef8755485569a0a339d6156dc01dce1d2f7e5665f5f439668d3f5ee386b0 [2021-12-15 10:08:41,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:08:41,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:08:41,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:08:41,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:08:41,697 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:08:41,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label41.c [2021-12-15 10:08:41,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f7d8c8f/fed16b32366941238c816b7c67c1d046/FLAG77ad768ea [2021-12-15 10:08:42,445 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:08:42,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label41.c [2021-12-15 10:08:42,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f7d8c8f/fed16b32366941238c816b7c67c1d046/FLAG77ad768ea [2021-12-15 10:08:42,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f7d8c8f/fed16b32366941238c816b7c67c1d046 [2021-12-15 10:08:42,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:08:42,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:08:42,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:08:42,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:08:42,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:08:42,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:42" (1/1) ... [2021-12-15 10:08:42,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb9e467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:42, skipping insertion in model container [2021-12-15 10:08:42,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:42" (1/1) ... [2021-12-15 10:08:42,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:08:42,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:08:42,943 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/Problem19_label41.c[1319,1332] [2021-12-15 10:08:43,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:08:43,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:08:43,930 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/Problem19_label41.c[1319,1332] [2021-12-15 10:08:44,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:08:44,496 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:08:44,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44 WrapperNode [2021-12-15 10:08:44,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:08:44,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:08:44,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:08:44,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:08:44,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:44,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,228 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-15 10:08:45,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:08:45,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:08:45,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:08:45,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:08:45,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:45,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:46,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:08:46,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:08:46,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:08:46,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:08:46,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (1/1) ... [2021-12-15 10:08:46,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:08:46,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:08:46,126 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 10:08:46,231 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 10:08:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:08:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:08:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:08:46,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:08:46,285 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:08:46,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:08:51,376 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:08:51,400 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:08:51,400 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:08:51,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:51 BoogieIcfgContainer [2021-12-15 10:08:51,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:08:51,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:08:51,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:08:51,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:08:51,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:08:42" (1/3) ... [2021-12-15 10:08:51,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451ed8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:51, skipping insertion in model container [2021-12-15 10:08:51,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:44" (2/3) ... [2021-12-15 10:08:51,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451ed8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:51, skipping insertion in model container [2021-12-15 10:08:51,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:51" (3/3) ... [2021-12-15 10:08:51,415 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label41.c [2021-12-15 10:08:51,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:08:51,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:08:51,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:08:51,481 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 10:08:51,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:08:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states 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 10:08:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:08:51,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:08:51,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:08:51,515 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:08:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:08:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-12-15 10:08:51,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:08:51,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419045542] [2021-12-15 10:08:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:08:51,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:08:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:08:51,616 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 10:08:51,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:08:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419045542] [2021-12-15 10:08:51,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419045542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:08:51,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:08:51,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:08:51,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116228029] [2021-12-15 10:08:51,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:08:51,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:08:51,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:08:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:08:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:08:51,642 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:08:57,629 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2021-12-15 10:08:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:08:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 10:08:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:08:57,653 INFO L225 Difference]: With dead ends: 4975 [2021-12-15 10:08:57,653 INFO L226 Difference]: Without dead ends: 3163 [2021-12-15 10:08:57,660 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 10:08:57,664 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1540 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:08:57,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1540 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-15 10:08:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-12-15 10:08:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2021-12-15 10:08:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states 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 10:08:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2021-12-15 10:08:57,774 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 6 [2021-12-15 10:08:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:08:57,774 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2021-12-15 10:08:57,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2021-12-15 10:08:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 10:08:57,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:08:57,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:08:57,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:08:57,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:08:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:08:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1360824213, now seen corresponding path program 1 times [2021-12-15 10:08:57,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:08:57,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751763939] [2021-12-15 10:08:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:08:57,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:08:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:08:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:08:57,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:08:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751763939] [2021-12-15 10:08:57,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751763939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:08:57,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:08:57,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:08:57,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406012815] [2021-12-15 10:08:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:08:57,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:08:57,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:08:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:08:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:08:57,926 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:03,675 INFO L93 Difference]: Finished difference Result 9175 states and 14984 transitions. [2021-12-15 10:09:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:03,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 10:09:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:03,717 INFO L225 Difference]: With dead ends: 9175 [2021-12-15 10:09:03,717 INFO L226 Difference]: Without dead ends: 6054 [2021-12-15 10:09:03,721 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 10:09:03,734 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1776 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:03,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1617 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4196 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 10:09:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2021-12-15 10:09:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 6040. [2021-12-15 10:09:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 6039 states have (on average 1.4207650273224044) internal successors, (8580), 6039 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states 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 10:09:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 8580 transitions. [2021-12-15 10:09:03,913 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 8580 transitions. Word has length 77 [2021-12-15 10:09:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:03,915 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 8580 transitions. [2021-12-15 10:09:03,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 8580 transitions. [2021-12-15 10:09:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 10:09:03,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:03,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:09:03,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:09:03,921 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 371793734, now seen corresponding path program 1 times [2021-12-15 10:09:03,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:03,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587973182] [2021-12-15 10:09:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:03,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:04,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587973182] [2021-12-15 10:09:04,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587973182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:04,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:04,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:04,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362478059] [2021-12-15 10:09:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:04,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:09:04,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:09:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:09:04,082 INFO L87 Difference]: Start difference. First operand 6040 states and 8580 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:13,626 INFO L93 Difference]: Finished difference Result 20364 states and 28349 transitions. [2021-12-15 10:09:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:09:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-15 10:09:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:13,664 INFO L225 Difference]: With dead ends: 20364 [2021-12-15 10:09:13,664 INFO L226 Difference]: Without dead ends: 14326 [2021-12-15 10:09:13,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:09:13,679 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 4032 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 9665 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4032 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 10959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 9665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:13,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4032 Valid, 2178 Invalid, 10959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 9665 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-12-15 10:09:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14326 states. [2021-12-15 10:09:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14326 to 14285. [2021-12-15 10:09:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14285 states, 14284 states have (on average 1.2220666479977598) internal successors, (17456), 14284 states have internal predecessors, (17456), 0 states have call successors, (0), 0 states 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 10:09:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 17456 transitions. [2021-12-15 10:09:13,954 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 17456 transitions. Word has length 88 [2021-12-15 10:09:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:13,956 INFO L470 AbstractCegarLoop]: Abstraction has 14285 states and 17456 transitions. [2021-12-15 10:09:13,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 17456 transitions. [2021-12-15 10:09:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 10:09:13,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:13,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:13,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:09:13,964 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash -627041309, now seen corresponding path program 1 times [2021-12-15 10:09:13,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:13,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478990747] [2021-12-15 10:09:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:13,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:14,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:14,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478990747] [2021-12-15 10:09:14,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478990747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:14,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:14,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:14,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793827020] [2021-12-15 10:09:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:14,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:14,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:09:14,133 INFO L87 Difference]: Start difference. First operand 14285 states and 17456 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:18,618 INFO L93 Difference]: Finished difference Result 28670 states and 36738 transitions. [2021-12-15 10:09:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-15 10:09:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:18,654 INFO L225 Difference]: With dead ends: 28670 [2021-12-15 10:09:18,654 INFO L226 Difference]: Without dead ends: 17117 [2021-12-15 10:09:18,667 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 10:09:18,668 INFO L933 BasicCegarLoop]: 3071 mSDtfsCounter, 1489 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 3250 SdHoareTripleChecker+Invalid, 5806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:18,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 3250 Invalid, 5806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 10:09:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17117 states. [2021-12-15 10:09:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17117 to 17050. [2021-12-15 10:09:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 17049 states have (on average 1.223356208575283) internal successors, (20857), 17049 states have internal predecessors, (20857), 0 states have call successors, (0), 0 states 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 10:09:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 20857 transitions. [2021-12-15 10:09:18,996 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 20857 transitions. Word has length 241 [2021-12-15 10:09:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:18,998 INFO L470 AbstractCegarLoop]: Abstraction has 17050 states and 20857 transitions. [2021-12-15 10:09:18,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 20857 transitions. [2021-12-15 10:09:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-15 10:09:19,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:19,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:19,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:09:19,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash 178391679, now seen corresponding path program 1 times [2021-12-15 10:09:19,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:19,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422725283] [2021-12-15 10:09:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:19,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:19,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422725283] [2021-12-15 10:09:19,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422725283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:19,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:19,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:19,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855539346] [2021-12-15 10:09:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:19,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:09:19,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:09:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:09:19,193 INFO L87 Difference]: Start difference. First operand 17050 states and 20857 transitions. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 10:09:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:23,700 INFO L93 Difference]: Finished difference Result 31399 states and 38995 transitions. [2021-12-15 10:09:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:09:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 309 [2021-12-15 10:09:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:23,723 INFO L225 Difference]: With dead ends: 31399 [2021-12-15 10:09:23,723 INFO L226 Difference]: Without dead ends: 17050 [2021-12-15 10:09:23,731 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 10:09:23,731 INFO L933 BasicCegarLoop]: 1770 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5715 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 5723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:23,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1949 Invalid, 5723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5715 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 10:09:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17050 states. [2021-12-15 10:09:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17050 to 17050. [2021-12-15 10:09:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 17049 states have (on average 1.2225937005102938) internal successors, (20844), 17049 states have internal predecessors, (20844), 0 states have call successors, (0), 0 states 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 10:09:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 20844 transitions. [2021-12-15 10:09:23,926 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 20844 transitions. Word has length 309 [2021-12-15 10:09:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:23,928 INFO L470 AbstractCegarLoop]: Abstraction has 17050 states and 20844 transitions. [2021-12-15 10:09:23,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 10:09:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 20844 transitions. [2021-12-15 10:09:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-12-15 10:09:23,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:23,937 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:23,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 10:09:23,938 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1213477960, now seen corresponding path program 1 times [2021-12-15 10:09:23,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835938584] [2021-12-15 10:09:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:23,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-15 10:09:24,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835938584] [2021-12-15 10:09:24,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835938584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:24,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:24,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:09:24,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136441905] [2021-12-15 10:09:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:24,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:24,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:09:24,175 INFO L87 Difference]: Start difference. First operand 17050 states and 20844 transitions. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 10:09:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:30,783 INFO L93 Difference]: Finished difference Result 45220 states and 56430 transitions. [2021-12-15 10:09:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:30,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 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 561 [2021-12-15 10:09:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:30,824 INFO L225 Difference]: With dead ends: 45220 [2021-12-15 10:09:30,824 INFO L226 Difference]: Without dead ends: 30902 [2021-12-15 10:09:30,834 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 10:09:30,834 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 2113 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:30,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 994 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-15 10:09:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30902 states. [2021-12-15 10:09:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30902 to 30899. [2021-12-15 10:09:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30899 states, 30898 states have (on average 1.205579649168231) internal successors, (37250), 30898 states have internal predecessors, (37250), 0 states have call successors, (0), 0 states 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 10:09:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30899 states to 30899 states and 37250 transitions. [2021-12-15 10:09:31,093 INFO L78 Accepts]: Start accepts. Automaton has 30899 states and 37250 transitions. Word has length 561 [2021-12-15 10:09:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:31,094 INFO L470 AbstractCegarLoop]: Abstraction has 30899 states and 37250 transitions. [2021-12-15 10:09:31,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 10:09:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 30899 states and 37250 transitions. [2021-12-15 10:09:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2021-12-15 10:09:31,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:31,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 10:09:31,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:09:31,109 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 191873428, now seen corresponding path program 1 times [2021-12-15 10:09:31,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205667268] [2021-12-15 10:09:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:31,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-15 10:09:31,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205667268] [2021-12-15 10:09:31,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205667268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:31,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:31,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:31,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999177237] [2021-12-15 10:09:31,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:31,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:31,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:31,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:09:31,310 INFO L87 Difference]: Start difference. First operand 30899 states and 37250 transitions. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 10:09:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:37,141 INFO L93 Difference]: Finished difference Result 83669 states and 102382 transitions. [2021-12-15 10:09:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 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 705 [2021-12-15 10:09:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:37,224 INFO L225 Difference]: With dead ends: 83669 [2021-12-15 10:09:37,224 INFO L226 Difference]: Without dead ends: 55502 [2021-12-15 10:09:37,254 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 10:09:37,256 INFO L933 BasicCegarLoop]: 3110 mSDtfsCounter, 1412 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 4613 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 3310 SdHoareTripleChecker+Invalid, 5773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 4613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:37,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 3310 Invalid, 5773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 4613 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 10:09:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55502 states. [2021-12-15 10:09:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55502 to 55492. [2021-12-15 10:09:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55492 states, 55491 states have (on average 1.1402749995494765) internal successors, (63275), 55491 states have internal predecessors, (63275), 0 states have call successors, (0), 0 states 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 10:09:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55492 states to 55492 states and 63275 transitions. [2021-12-15 10:09:37,829 INFO L78 Accepts]: Start accepts. Automaton has 55492 states and 63275 transitions. Word has length 705 [2021-12-15 10:09:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:37,830 INFO L470 AbstractCegarLoop]: Abstraction has 55492 states and 63275 transitions. [2021-12-15 10:09:37,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 10:09:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55492 states and 63275 transitions. [2021-12-15 10:09:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2021-12-15 10:09:37,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:37,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:09:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 10:09:37,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1363328089, now seen corresponding path program 1 times [2021-12-15 10:09:37,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529394777] [2021-12-15 10:09:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:37,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 29 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:38,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:38,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529394777] [2021-12-15 10:09:38,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529394777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:09:38,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005534735] [2021-12-15 10:09:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:38,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:09:38,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:09:38,171 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 10:09:38,198 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 10:09:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:09:38,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:09:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-15 10:09:39,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:09:39,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005534735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:39,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:09:39,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 10:09:39,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047721247] [2021-12-15 10:09:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:39,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:39,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:09:39,320 INFO L87 Difference]: Start difference. First operand 55492 states and 63275 transitions. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 10:09:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:45,359 INFO L93 Difference]: Finished difference Result 130229 states and 150339 transitions. [2021-12-15 10:09:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 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 712 [2021-12-15 10:09:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:45,468 INFO L225 Difference]: With dead ends: 130229 [2021-12-15 10:09:45,469 INFO L226 Difference]: Without dead ends: 77469 [2021-12-15 10:09:45,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:09:45,507 INFO L933 BasicCegarLoop]: 3067 mSDtfsCounter, 1480 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4986 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 5991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 4986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:45,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 3242 Invalid, 5991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 4986 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 10:09:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77469 states. [2021-12-15 10:09:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77469 to 77355. [2021-12-15 10:09:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77355 states, 77354 states have (on average 1.123691082555524) internal successors, (86922), 77354 states have internal predecessors, (86922), 0 states have call successors, (0), 0 states 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 10:09:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77355 states to 77355 states and 86922 transitions. [2021-12-15 10:09:46,161 INFO L78 Accepts]: Start accepts. Automaton has 77355 states and 86922 transitions. Word has length 712 [2021-12-15 10:09:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:46,162 INFO L470 AbstractCegarLoop]: Abstraction has 77355 states and 86922 transitions. [2021-12-15 10:09:46,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 10:09:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 77355 states and 86922 transitions. [2021-12-15 10:09:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2021-12-15 10:09:46,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:46,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:46,187 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 10:09:46,386 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 10:09:46,387 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1856513753, now seen corresponding path program 1 times [2021-12-15 10:09:46,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:46,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881558694] [2021-12-15 10:09:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:46,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-15 10:09:46,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881558694] [2021-12-15 10:09:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881558694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:46,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:46,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532345830] [2021-12-15 10:09:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:46,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:46,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:46,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:09:46,658 INFO L87 Difference]: Start difference. First operand 77355 states and 86922 transitions. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)