./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label01.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/Problem17_label01.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 a4e6e263a6fe01660f2ecabfa1a654296517a773a2b8a9b458da8809aa3aafd8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:56:49,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:56:49,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:56:49,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:56:49,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:56:49,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:56:49,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:56:49,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:56:49,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:56:49,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:56:49,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:56:49,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:56:49,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:56:49,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:56:49,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:56:49,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:56:49,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:56:49,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:56:49,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:56:49,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:56:49,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:56:49,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:56:49,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:56:49,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:56:49,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:56:49,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:56:49,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:56:49,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:56:49,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:56:49,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:56:49,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:56:49,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:56:49,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:56:49,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:56:49,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:56:49,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:56:49,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:56:49,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:56:49,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:56:49,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:56:49,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:56:49,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:56:49,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:56:49,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:56:49,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:56:49,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:56:49,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:56:49,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:56:49,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:56:49,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:56:49,479 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:56:49,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:56:49,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:56:49,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:56:49,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:56:49,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:56:49,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:56:49,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:56:49,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:56:49,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:56:49,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:56:49,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:56:49,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:56:49,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:56:49,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:56:49,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:56:49,483 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:56:49,483 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:56:49,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:56:49,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:56:49,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e6e263a6fe01660f2ecabfa1a654296517a773a2b8a9b458da8809aa3aafd8 [2021-12-15 09:56:49,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:56:49,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:56:49,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:56:49,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:56:49,698 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:56:49,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label01.c [2021-12-15 09:56:49,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56cc20d7/628022b95c2b419eac44be41941d68e8/FLAG40b7f1ec7 [2021-12-15 09:56:50,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:56:50,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label01.c [2021-12-15 09:56:50,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56cc20d7/628022b95c2b419eac44be41941d68e8/FLAG40b7f1ec7 [2021-12-15 09:56:50,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56cc20d7/628022b95c2b419eac44be41941d68e8 [2021-12-15 09:56:50,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:56:50,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:56:50,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:56:50,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:56:50,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:56:50,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:56:50" (1/1) ... [2021-12-15 09:56:50,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff0476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:50, skipping insertion in model container [2021-12-15 09:56:50,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:56:50" (1/1) ... [2021-12-15 09:56:50,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:56:50,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:56:50,819 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/Problem17_label01.c[6877,6890] [2021-12-15 09:56:51,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:56:51,166 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:56:51,196 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/Problem17_label01.c[6877,6890] [2021-12-15 09:56:51,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:56:51,408 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:56:51,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51 WrapperNode [2021-12-15 09:56:51,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:56:51,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:56:51,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:56:51,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:56:51,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,694 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 09:56:51,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:56:51,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:56:51,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:56:51,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:56:51,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:51,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:56:51,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:56:51,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:56:51,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:56:52,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (1/1) ... [2021-12-15 09:56:52,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:56:52,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:52,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:56:52,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:56:52,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:56:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:56:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:56:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:56:52,224 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:56:52,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:56:54,269 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:56:54,280 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:56:54,283 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:56:54,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:56:54 BoogieIcfgContainer [2021-12-15 09:56:54,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:56:54,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:56:54,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:56:54,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:56:54,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:56:50" (1/3) ... [2021-12-15 09:56:54,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368b14d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:56:54, skipping insertion in model container [2021-12-15 09:56:54,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:51" (2/3) ... [2021-12-15 09:56:54,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368b14d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:56:54, skipping insertion in model container [2021-12-15 09:56:54,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:56:54" (3/3) ... [2021-12-15 09:56:54,291 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label01.c [2021-12-15 09:56:54,294 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:56:54,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:56:54,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:56:54,334 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:56:54,335 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:56:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 09:56:54,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:54,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:54,355 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-12-15 09:56:54,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:54,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916219170] [2021-12-15 09:56:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:54,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:56:54,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916219170] [2021-12-15 09:56:54,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916219170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:54,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:54,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:56:54,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745867596] [2021-12-15 09:56:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:54,521 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:56,741 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-15 09:56:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:56,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-15 09:56:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:56,764 INFO L225 Difference]: With dead ends: 1642 [2021-12-15 09:56:56,765 INFO L226 Difference]: Without dead ends: 975 [2021-12-15 09:56:56,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:56,770 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 444 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:56,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:56:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-15 09:56:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-15 09:56:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-15 09:56:56,847 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 46 [2021-12-15 09:56:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:56,848 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-15 09:56:56,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-15 09:56:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 09:56:56,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:56,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:56,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:56:56,860 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1486088630, now seen corresponding path program 1 times [2021-12-15 09:56:56,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:56,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924662455] [2021-12-15 09:56:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:56,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:56:57,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:57,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924662455] [2021-12-15 09:56:57,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924662455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:57,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:57,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:57,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937342998] [2021-12-15 09:56:57,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:57,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:56:57,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:57,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:56:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:56:57,095 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:00,606 INFO L93 Difference]: Finished difference Result 3735 states and 5654 transitions. [2021-12-15 09:57:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:57:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-15 09:57:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:00,615 INFO L225 Difference]: With dead ends: 3735 [2021-12-15 09:57:00,615 INFO L226 Difference]: Without dead ends: 2765 [2021-12-15 09:57:00,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:57:00,620 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 873 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:00,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 314 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 09:57:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-12-15 09:57:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2724. [2021-12-15 09:57:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.3944179214102093) internal successors, (3797), 2723 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3797 transitions. [2021-12-15 09:57:00,681 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3797 transitions. Word has length 116 [2021-12-15 09:57:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 3797 transitions. [2021-12-15 09:57:00,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3797 transitions. [2021-12-15 09:57:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-15 09:57:00,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:00,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:57:00,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:57:00,690 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1102935076, now seen corresponding path program 1 times [2021-12-15 09:57:00,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:00,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702584503] [2021-12-15 09:57:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:00,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:00,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:00,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702584503] [2021-12-15 09:57:00,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702584503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:00,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:00,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:57:00,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058632737] [2021-12-15 09:57:00,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:00,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:00,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:00,829 INFO L87 Difference]: Start difference. First operand 2724 states and 3797 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:03,109 INFO L93 Difference]: Finished difference Result 6325 states and 8834 transitions. [2021-12-15 09:57:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-15 09:57:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:03,122 INFO L225 Difference]: With dead ends: 6325 [2021-12-15 09:57:03,122 INFO L226 Difference]: Without dead ends: 3603 [2021-12-15 09:57:03,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:03,128 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:03,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:57:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-12-15 09:57:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3583. [2021-12-15 09:57:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3604131769960917) internal successors, (4873), 3582 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4873 transitions. [2021-12-15 09:57:03,180 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4873 transitions. Word has length 151 [2021-12-15 09:57:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:03,181 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4873 transitions. [2021-12-15 09:57:03,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4873 transitions. [2021-12-15 09:57:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-15 09:57:03,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:03,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:57:03,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:57:03,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2111347437, now seen corresponding path program 1 times [2021-12-15 09:57:03,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:03,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153172820] [2021-12-15 09:57:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:03,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:03,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:03,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153172820] [2021-12-15 09:57:03,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153172820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:03,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:03,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:03,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770771043] [2021-12-15 09:57:03,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:03,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:57:03,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:57:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:57:03,333 INFO L87 Difference]: Start difference. First operand 3583 states and 4873 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:05,364 INFO L93 Difference]: Finished difference Result 6753 states and 9152 transitions. [2021-12-15 09:57:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:57:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-12-15 09:57:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:05,374 INFO L225 Difference]: With dead ends: 6753 [2021-12-15 09:57:05,374 INFO L226 Difference]: Without dead ends: 3172 [2021-12-15 09:57:05,379 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 09:57:05,380 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:05,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:57:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-12-15 09:57:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3149. [2021-12-15 09:57:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 1.3430749682337992) internal successors, (4228), 3148 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4228 transitions. [2021-12-15 09:57:05,463 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4228 transitions. Word has length 157 [2021-12-15 09:57:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:05,464 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 4228 transitions. [2021-12-15 09:57:05,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4228 transitions. [2021-12-15 09:57:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-15 09:57:05,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:05,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:57:05,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1454031604, now seen corresponding path program 1 times [2021-12-15 09:57:05,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:05,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401388076] [2021-12-15 09:57:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:05,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-15 09:57:05,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401388076] [2021-12-15 09:57:05,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401388076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:05,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:05,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:57:05,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579455010] [2021-12-15 09:57:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:05,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:05,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:05,546 INFO L87 Difference]: Start difference. First operand 3149 states and 4228 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:07,218 INFO L93 Difference]: Finished difference Result 8434 states and 11589 transitions. [2021-12-15 09:57:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:07,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-15 09:57:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:07,229 INFO L225 Difference]: With dead ends: 8434 [2021-12-15 09:57:07,230 INFO L226 Difference]: Without dead ends: 4853 [2021-12-15 09:57:07,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:07,234 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:07,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:57:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2021-12-15 09:57:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4001. [2021-12-15 09:57:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 4000 states have (on average 1.22775) internal successors, (4911), 4000 states have internal predecessors, (4911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4911 transitions. [2021-12-15 09:57:07,330 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4911 transitions. Word has length 187 [2021-12-15 09:57:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 4911 transitions. [2021-12-15 09:57:07,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4911 transitions. [2021-12-15 09:57:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 09:57:07,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:07,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:07,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:57:07,333 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash 877442312, now seen corresponding path program 1 times [2021-12-15 09:57:07,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:07,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993106885] [2021-12-15 09:57:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:07,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:57:07,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:07,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993106885] [2021-12-15 09:57:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993106885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:07,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:07,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:07,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143346341] [2021-12-15 09:57:07,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:07,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:07,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:07,415 INFO L87 Difference]: Start difference. First operand 4001 states and 4911 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:09,167 INFO L93 Difference]: Finished difference Result 10125 states and 12629 transitions. [2021-12-15 09:57:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 200 [2021-12-15 09:57:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:09,187 INFO L225 Difference]: With dead ends: 10125 [2021-12-15 09:57:09,188 INFO L226 Difference]: Without dead ends: 6126 [2021-12-15 09:57:09,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:09,195 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 414 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:09,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 477 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-12-15 09:57:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3978. [2021-12-15 09:57:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.2260497862710587) internal successors, (4876), 3977 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4876 transitions. [2021-12-15 09:57:09,275 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4876 transitions. Word has length 200 [2021-12-15 09:57:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:09,276 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 4876 transitions. [2021-12-15 09:57:09,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4876 transitions. [2021-12-15 09:57:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 09:57:09,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:09,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:09,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:57:09,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:09,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1977830355, now seen corresponding path program 1 times [2021-12-15 09:57:09,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:09,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179507821] [2021-12-15 09:57:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:09,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:09,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179507821] [2021-12-15 09:57:09,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179507821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:09,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:09,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:09,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934719908] [2021-12-15 09:57:09,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:09,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:09,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:09,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:09,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:09,342 INFO L87 Difference]: Start difference. First operand 3978 states and 4876 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:11,088 INFO L93 Difference]: Finished difference Result 10511 states and 13139 transitions. [2021-12-15 09:57:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2021-12-15 09:57:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:11,116 INFO L225 Difference]: With dead ends: 10511 [2021-12-15 09:57:11,116 INFO L226 Difference]: Without dead ends: 6535 [2021-12-15 09:57:11,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:11,121 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 487 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:11,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 788 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-12-15 09:57:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6535. [2021-12-15 09:57:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6535 states, 6534 states have (on average 1.2058463422099786) internal successors, (7879), 6534 states have internal predecessors, (7879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 7879 transitions. [2021-12-15 09:57:11,222 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 7879 transitions. Word has length 207 [2021-12-15 09:57:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 6535 states and 7879 transitions. [2021-12-15 09:57:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 7879 transitions. [2021-12-15 09:57:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 09:57:11,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:11,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:11,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:57:11,226 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1969648980, now seen corresponding path program 1 times [2021-12-15 09:57:11,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:11,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903714906] [2021-12-15 09:57:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:11,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 226 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 09:57:11,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:11,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903714906] [2021-12-15 09:57:11,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903714906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654848861] [2021-12-15 09:57:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:11,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:11,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:57:11,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:57:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:57:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 226 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 09:57:12,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:57:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 09:57:12,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654848861] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:12,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:57:12,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 09:57:12,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478143322] [2021-12-15 09:57:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:12,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:57:12,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:57:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:57:12,775 INFO L87 Difference]: Start difference. First operand 6535 states and 7879 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:15,977 INFO L93 Difference]: Finished difference Result 21183 states and 25861 transitions. [2021-12-15 09:57:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:57:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-12-15 09:57:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:16,026 INFO L225 Difference]: With dead ends: 21183 [2021-12-15 09:57:16,027 INFO L226 Difference]: Without dead ends: 14218 [2021-12-15 09:57:16,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 535 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:57:16,035 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1071 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:16,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 147 Invalid, 3471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 09:57:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2021-12-15 09:57:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2021-12-15 09:57:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14216 states, 14215 states have (on average 1.1974674639465352) internal successors, (17022), 14215 states have internal predecessors, (17022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 17022 transitions. [2021-12-15 09:57:16,224 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 17022 transitions. Word has length 270 [2021-12-15 09:57:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:16,224 INFO L470 AbstractCegarLoop]: Abstraction has 14216 states and 17022 transitions. [2021-12-15 09:57:16,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 17022 transitions. [2021-12-15 09:57:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-15 09:57:16,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:16,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:16,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:57:16,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:16,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2103078840, now seen corresponding path program 1 times [2021-12-15 09:57:16,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639798329] [2021-12-15 09:57:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:16,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 09:57:16,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639798329] [2021-12-15 09:57:16,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639798329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:16,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:16,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:16,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340027995] [2021-12-15 09:57:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:16,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:16,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:16,545 INFO L87 Difference]: Start difference. First operand 14216 states and 17022 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:18,367 INFO L93 Difference]: Finished difference Result 31407 states and 37752 transitions. [2021-12-15 09:57:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:18,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2021-12-15 09:57:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:18,389 INFO L225 Difference]: With dead ends: 31407 [2021-12-15 09:57:18,389 INFO L226 Difference]: Without dead ends: 17193 [2021-12-15 09:57:18,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:18,398 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 373 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:18,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 904 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17193 states. [2021-12-15 09:57:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17193 to 16767. [2021-12-15 09:57:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16767 states, 16766 states have (on average 1.181617559346296) internal successors, (19811), 16766 states have internal predecessors, (19811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16767 states to 16767 states and 19811 transitions. [2021-12-15 09:57:18,571 INFO L78 Accepts]: Start accepts. Automaton has 16767 states and 19811 transitions. Word has length 283 [2021-12-15 09:57:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:18,572 INFO L470 AbstractCegarLoop]: Abstraction has 16767 states and 19811 transitions. [2021-12-15 09:57:18,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 16767 states and 19811 transitions. [2021-12-15 09:57:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-15 09:57:18,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:18,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:18,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:57:18,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1063038644, now seen corresponding path program 1 times [2021-12-15 09:57:18,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:18,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459317693] [2021-12-15 09:57:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:18,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:57:18,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459317693] [2021-12-15 09:57:18,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459317693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:18,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:18,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:18,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275325639] [2021-12-15 09:57:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:18,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:18,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:18,669 INFO L87 Difference]: Start difference. First operand 16767 states and 19811 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:20,538 INFO L93 Difference]: Finished difference Result 37785 states and 44619 transitions. [2021-12-15 09:57:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:20,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2021-12-15 09:57:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:20,563 INFO L225 Difference]: With dead ends: 37785 [2021-12-15 09:57:20,563 INFO L226 Difference]: Without dead ends: 20586 [2021-12-15 09:57:20,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:20,579 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 447 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:20,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 391 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20586 states. [2021-12-15 09:57:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20586 to 19304. [2021-12-15 09:57:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19304 states, 19303 states have (on average 1.1638605398124644) internal successors, (22466), 19303 states have internal predecessors, (22466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19304 states to 19304 states and 22466 transitions. [2021-12-15 09:57:20,875 INFO L78 Accepts]: Start accepts. Automaton has 19304 states and 22466 transitions. Word has length 284 [2021-12-15 09:57:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:20,875 INFO L470 AbstractCegarLoop]: Abstraction has 19304 states and 22466 transitions. [2021-12-15 09:57:20,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 19304 states and 22466 transitions. [2021-12-15 09:57:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 09:57:20,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:20,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:20,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:57:20,880 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 505503923, now seen corresponding path program 1 times [2021-12-15 09:57:20,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:20,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347716894] [2021-12-15 09:57:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:20,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:57:20,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347716894] [2021-12-15 09:57:20,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347716894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:20,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:20,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:57:20,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497920683] [2021-12-15 09:57:20,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:20,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:57:20,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:20,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:57:20,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:57:20,970 INFO L87 Difference]: Start difference. First operand 19304 states and 22466 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:23,703 INFO L93 Difference]: Finished difference Result 56537 states and 65555 transitions. [2021-12-15 09:57:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:57:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 306 [2021-12-15 09:57:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:23,741 INFO L225 Difference]: With dead ends: 56537 [2021-12-15 09:57:23,741 INFO L226 Difference]: Without dead ends: 34257 [2021-12-15 09:57:23,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:57:23,761 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 867 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:23,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 348 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:57:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34257 states. [2021-12-15 09:57:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34257 to 33356. [2021-12-15 09:57:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33356 states, 33355 states have (on average 1.1540698545945136) internal successors, (38494), 33355 states have internal predecessors, (38494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33356 states to 33356 states and 38494 transitions. [2021-12-15 09:57:24,196 INFO L78 Accepts]: Start accepts. Automaton has 33356 states and 38494 transitions. Word has length 306 [2021-12-15 09:57:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:24,196 INFO L470 AbstractCegarLoop]: Abstraction has 33356 states and 38494 transitions. [2021-12-15 09:57:24,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 33356 states and 38494 transitions. [2021-12-15 09:57:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-15 09:57:24,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:24,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:24,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:57:24,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash -948205666, now seen corresponding path program 1 times [2021-12-15 09:57:24,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:24,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734265243] [2021-12-15 09:57:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:24,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 09:57:24,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734265243] [2021-12-15 09:57:24,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734265243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:24,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:24,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:24,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685025649] [2021-12-15 09:57:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:24,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:24,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:24,300 INFO L87 Difference]: Start difference. First operand 33356 states and 38494 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:26,209 INFO L93 Difference]: Finished difference Result 84186 states and 96830 transitions. [2021-12-15 09:57:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:26,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 321 [2021-12-15 09:57:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:26,269 INFO L225 Difference]: With dead ends: 84186 [2021-12-15 09:57:26,269 INFO L226 Difference]: Without dead ends: 49130 [2021-12-15 09:57:26,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:26,293 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 364 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:26,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 812 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49130 states. [2021-12-15 09:57:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49130 to 47418. [2021-12-15 09:57:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47418 states, 47417 states have (on average 1.119978066938018) internal successors, (53106), 47417 states have internal predecessors, (53106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47418 states to 47418 states and 53106 transitions. [2021-12-15 09:57:26,851 INFO L78 Accepts]: Start accepts. Automaton has 47418 states and 53106 transitions. Word has length 321 [2021-12-15 09:57:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:26,851 INFO L470 AbstractCegarLoop]: Abstraction has 47418 states and 53106 transitions. [2021-12-15 09:57:26,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 47418 states and 53106 transitions. [2021-12-15 09:57:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-15 09:57:26,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:26,857 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:57:26,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:57:26,857 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 966513164, now seen corresponding path program 1 times [2021-12-15 09:57:26,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:26,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177820114] [2021-12-15 09:57:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:26,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 09:57:26,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:26,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177820114] [2021-12-15 09:57:26,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177820114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:26,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:26,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:26,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980499630] [2021-12-15 09:57:26,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:26,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:26,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:26,971 INFO L87 Difference]: Start difference. First operand 47418 states and 53106 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:28,597 INFO L93 Difference]: Finished difference Result 95685 states and 107100 transitions. [2021-12-15 09:57:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2021-12-15 09:57:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:28,645 INFO L225 Difference]: With dead ends: 95685 [2021-12-15 09:57:28,645 INFO L226 Difference]: Without dead ends: 47844 [2021-12-15 09:57:28,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:28,669 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 383 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:28,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 882 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:57:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47844 states. [2021-12-15 09:57:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47844 to 47843. [2021-12-15 09:57:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47843 states, 47842 states have (on average 1.11828518874629) internal successors, (53501), 47842 states have internal predecessors, (53501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47843 states to 47843 states and 53501 transitions. [2021-12-15 09:57:29,052 INFO L78 Accepts]: Start accepts. Automaton has 47843 states and 53501 transitions. Word has length 340 [2021-12-15 09:57:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:29,053 INFO L470 AbstractCegarLoop]: Abstraction has 47843 states and 53501 transitions. [2021-12-15 09:57:29,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 47843 states and 53501 transitions. [2021-12-15 09:57:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-15 09:57:29,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:29,083 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:29,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:57:29,084 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash 932540690, now seen corresponding path program 1 times [2021-12-15 09:57:29,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:29,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138706025] [2021-12-15 09:57:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:29,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 340 proven. 214 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 09:57:29,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:29,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138706025] [2021-12-15 09:57:29,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138706025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:29,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784602880] [2021-12-15 09:57:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:29,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:29,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:57:29,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:57:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:57:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 367 proven. 73 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-15 09:57:30,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:57:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-15 09:57:30,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784602880] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:30,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:57:30,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-15 09:57:30,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783722010] [2021-12-15 09:57:30,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:30,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:57:30,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:57:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:57:30,899 INFO L87 Difference]: Start difference. First operand 47843 states and 53501 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:33,872 INFO L93 Difference]: Finished difference Result 111881 states and 125398 transitions. [2021-12-15 09:57:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:57:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 344 [2021-12-15 09:57:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:33,954 INFO L225 Difference]: With dead ends: 111881 [2021-12-15 09:57:33,954 INFO L226 Difference]: Without dead ends: 64040 [2021-12-15 09:57:33,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:57:33,966 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 856 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:33,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 204 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:57:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64040 states. [2021-12-15 09:57:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64040 to 60635. [2021-12-15 09:57:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60635 states, 60634 states have (on average 1.12387439390441) internal successors, (68145), 60634 states have internal predecessors, (68145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60635 states to 60635 states and 68145 transitions. [2021-12-15 09:57:34,816 INFO L78 Accepts]: Start accepts. Automaton has 60635 states and 68145 transitions. Word has length 344 [2021-12-15 09:57:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:34,816 INFO L470 AbstractCegarLoop]: Abstraction has 60635 states and 68145 transitions. [2021-12-15 09:57:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 60635 states and 68145 transitions. [2021-12-15 09:57:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-15 09:57:34,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:34,821 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:34,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 09:57:35,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 09:57:35,038 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1745749995, now seen corresponding path program 1 times [2021-12-15 09:57:35,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:35,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613986970] [2021-12-15 09:57:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:35,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 09:57:35,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:35,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613986970] [2021-12-15 09:57:35,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613986970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:35,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:35,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:35,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84007502] [2021-12-15 09:57:35,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:35,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:35,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:35,235 INFO L87 Difference]: Start difference. First operand 60635 states and 68145 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:37,453 INFO L93 Difference]: Finished difference Result 130651 states and 147068 transitions. [2021-12-15 09:57:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 358 [2021-12-15 09:57:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:37,525 INFO L225 Difference]: With dead ends: 130651 [2021-12-15 09:57:37,525 INFO L226 Difference]: Without dead ends: 69587 [2021-12-15 09:57:37,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:37,666 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 473 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:37,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 322 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:57:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69587 states. [2021-12-15 09:57:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69587 to 67880. [2021-12-15 09:57:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67880 states, 67879 states have (on average 1.1204643556917455) internal successors, (76056), 67879 states have internal predecessors, (76056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67880 states to 67880 states and 76056 transitions. [2021-12-15 09:57:38,508 INFO L78 Accepts]: Start accepts. Automaton has 67880 states and 76056 transitions. Word has length 358 [2021-12-15 09:57:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:38,509 INFO L470 AbstractCegarLoop]: Abstraction has 67880 states and 76056 transitions. [2021-12-15 09:57:38,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 67880 states and 76056 transitions. [2021-12-15 09:57:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-15 09:57:38,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:38,515 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-15 09:57:38,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:57:38,516 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1459095844, now seen corresponding path program 1 times [2021-12-15 09:57:38,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407160900] [2021-12-15 09:57:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:38,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-15 09:57:38,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407160900] [2021-12-15 09:57:38,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407160900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:38,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:38,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:38,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911056101] [2021-12-15 09:57:38,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:38,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:38,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:38,722 INFO L87 Difference]: Start difference. First operand 67880 states and 76056 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:40,629 INFO L93 Difference]: Finished difference Result 153201 states and 171684 transitions. [2021-12-15 09:57:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 374 [2021-12-15 09:57:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:40,728 INFO L225 Difference]: With dead ends: 153201 [2021-12-15 09:57:40,729 INFO L226 Difference]: Without dead ends: 84471 [2021-12-15 09:57:40,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:40,766 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 385 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:40,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 844 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:57:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84471 states. [2021-12-15 09:57:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84471 to 68694. [2021-12-15 09:57:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68694 states, 68693 states have (on average 1.1177994846636483) internal successors, (76785), 68693 states have internal predecessors, (76785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68694 states to 68694 states and 76785 transitions. [2021-12-15 09:57:41,698 INFO L78 Accepts]: Start accepts. Automaton has 68694 states and 76785 transitions. Word has length 374 [2021-12-15 09:57:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 68694 states and 76785 transitions. [2021-12-15 09:57:41,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 68694 states and 76785 transitions. [2021-12-15 09:57:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-15 09:57:41,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:41,703 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:41,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:57:41,704 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 581192442, now seen corresponding path program 1 times [2021-12-15 09:57:41,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361217941] [2021-12-15 09:57:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:41,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 09:57:41,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361217941] [2021-12-15 09:57:41,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361217941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:41,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:41,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:41,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659451044] [2021-12-15 09:57:41,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:41,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:41,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:41,937 INFO L87 Difference]: Start difference. First operand 68694 states and 76785 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:43,270 INFO L93 Difference]: Finished difference Result 137384 states and 153566 transitions. [2021-12-15 09:57:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:43,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 379 [2021-12-15 09:57:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:43,340 INFO L225 Difference]: With dead ends: 137384 [2021-12-15 09:57:43,341 INFO L226 Difference]: Without dead ends: 68691 [2021-12-15 09:57:43,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:43,369 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 584 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:43,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 563 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:57:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68691 states. [2021-12-15 09:57:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68691 to 68690. [2021-12-15 09:57:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68690 states, 68689 states have (on average 1.1168018168847995) internal successors, (76712), 68689 states have internal predecessors, (76712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68690 states to 68690 states and 76712 transitions. [2021-12-15 09:57:44,270 INFO L78 Accepts]: Start accepts. Automaton has 68690 states and 76712 transitions. Word has length 379 [2021-12-15 09:57:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:44,271 INFO L470 AbstractCegarLoop]: Abstraction has 68690 states and 76712 transitions. [2021-12-15 09:57:44,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 68690 states and 76712 transitions. [2021-12-15 09:57:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-15 09:57:44,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:44,276 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:44,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:57:44,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash -632262739, now seen corresponding path program 1 times [2021-12-15 09:57:44,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:44,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445034751] [2021-12-15 09:57:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:44,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 540 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-15 09:57:44,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445034751] [2021-12-15 09:57:44,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445034751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:44,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:44,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:44,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447786656] [2021-12-15 09:57:44,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:44,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:44,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:44,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:44,359 INFO L87 Difference]: Start difference. First operand 68690 states and 76712 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:46,655 INFO L93 Difference]: Finished difference Result 160793 states and 179951 transitions. [2021-12-15 09:57:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 392 [2021-12-15 09:57:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:46,773 INFO L225 Difference]: With dead ends: 160793 [2021-12-15 09:57:46,773 INFO L226 Difference]: Without dead ends: 91675 [2021-12-15 09:57:46,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:47,000 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 398 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:47,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 404 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 09:57:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91675 states. [2021-12-15 09:57:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91675 to 85704. [2021-12-15 09:57:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85704 states, 85703 states have (on average 1.1069857531241614) internal successors, (94872), 85703 states have internal predecessors, (94872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85704 states to 85704 states and 94872 transitions. [2021-12-15 09:57:47,947 INFO L78 Accepts]: Start accepts. Automaton has 85704 states and 94872 transitions. Word has length 392 [2021-12-15 09:57:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:47,947 INFO L470 AbstractCegarLoop]: Abstraction has 85704 states and 94872 transitions. [2021-12-15 09:57:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 85704 states and 94872 transitions. [2021-12-15 09:57:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-15 09:57:47,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:47,954 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:47,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:57:47,954 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash 419479024, now seen corresponding path program 1 times [2021-12-15 09:57:47,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:47,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319895243] [2021-12-15 09:57:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:47,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 346 proven. 44 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 09:57:48,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319895243] [2021-12-15 09:57:48,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319895243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473130957] [2021-12-15 09:57:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:48,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:48,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:57:48,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:57:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:57:48,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 417 proven. 82 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 09:57:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:57:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 417 proven. 82 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 09:57:50,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473130957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:57:50,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:57:50,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-15 09:57:50,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862885693] [2021-12-15 09:57:50,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:57:50,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:57:50,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:57:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:57:50,504 INFO L87 Difference]: Start difference. First operand 85704 states and 94872 transitions. Second operand has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)