./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label31.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 c9e1a0326cfbd74069fe8a9392496d7bba5eb0c64820bba9b08ddeb981e8ffba --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:51:17,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:51:17,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:51:17,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:51:17,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:51:17,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:51:17,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:51:17,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:51:17,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:51:17,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:51:17,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:51:17,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:51:17,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:51:17,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:51:17,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:51:17,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:51:17,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:51:17,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:51:17,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:51:17,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:51:17,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:51:17,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:51:17,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:51:17,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:51:17,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:51:17,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:51:17,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:51:17,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:51:17,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:51:17,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:51:17,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:51:17,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:51:17,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:51:17,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:51:17,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:51:17,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:51:17,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:51:17,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:51:17,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:51:17,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:51:17,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:51:17,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:51:17,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:51:17,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:51:17,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:51:17,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:51:17,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:51:17,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:51:17,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:51:17,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:51:17,313 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:51:17,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:51:17,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:51:17,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:51:17,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:51:17,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:51:17,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:51:17,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:51:17,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:51:17,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:51:17,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:51:17,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:51:17,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:51:17,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:51:17,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:51:17,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:51:17,318 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:51:17,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:51:17,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:51:17,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:51:17,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9e1a0326cfbd74069fe8a9392496d7bba5eb0c64820bba9b08ddeb981e8ffba [2021-12-15 09:51:17,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:51:17,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:51:17,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:51:17,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:51:17,551 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:51:17,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label31.c [2021-12-15 09:51:17,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4376012ed/102ad81f79c14dfd9eadb1a669336c4a/FLAG2ef8a4e98 [2021-12-15 09:51:17,991 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:51:17,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label31.c [2021-12-15 09:51:18,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4376012ed/102ad81f79c14dfd9eadb1a669336c4a/FLAG2ef8a4e98 [2021-12-15 09:51:18,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4376012ed/102ad81f79c14dfd9eadb1a669336c4a [2021-12-15 09:51:18,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:51:18,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:51:18,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:51:18,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:51:18,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:51:18,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:18,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62863b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18, skipping insertion in model container [2021-12-15 09:51:18,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:18,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:51:18,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:51:18,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label31.c[7892,7905] [2021-12-15 09:51:18,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:51:18,843 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:51:18,868 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label31.c[7892,7905] [2021-12-15 09:51:18,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:51:18,985 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:51:18,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18 WrapperNode [2021-12-15 09:51:18,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:51:18,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:51:18,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:51:18,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:51:18,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,198 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 09:51:19,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:51:19,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:51:19,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:51:19,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:51:19,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:51:19,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:51:19,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:51:19,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:51:19,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (1/1) ... [2021-12-15 09:51:19,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:51:19,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:51:19,385 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 09:51:19,413 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 09:51:19,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:51:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:51:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:51:19,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:51:19,471 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:51:19,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:51:21,474 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:51:21,481 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:51:21,481 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:51:21,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:51:21 BoogieIcfgContainer [2021-12-15 09:51:21,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:51:21,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:51:21,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:51:21,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:51:21,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:51:18" (1/3) ... [2021-12-15 09:51:21,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6aa90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:51:21, skipping insertion in model container [2021-12-15 09:51:21,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:51:18" (2/3) ... [2021-12-15 09:51:21,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6aa90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:51:21, skipping insertion in model container [2021-12-15 09:51:21,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:51:21" (3/3) ... [2021-12-15 09:51:21,493 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2021-12-15 09:51:21,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:51:21,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:51:21,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:51:21,553 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 09:51:21,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:51:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:51:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 09:51:21,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:21,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:21,589 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:21,593 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-15 09:51:21,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869021854] [2021-12-15 09:51:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:21,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:21,816 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 09:51:21,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:21,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869021854] [2021-12-15 09:51:21,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869021854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:21,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:21,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:51:21,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870259288] [2021-12-15 09:51:21,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:21,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:21,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:21,849 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 09:51:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:23,652 INFO L93 Difference]: Finished difference Result 1197 states and 2163 transitions. [2021-12-15 09:51:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:23,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 09:51:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:23,665 INFO L225 Difference]: With dead ends: 1197 [2021-12-15 09:51:23,665 INFO L226 Difference]: Without dead ends: 694 [2021-12-15 09:51:23,668 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 09:51:23,670 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 353 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 114 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:51:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-15 09:51:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 684. [2021-12-15 09:51:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.718887262079063) internal successors, (1174), 683 states have internal predecessors, (1174), 0 states have call successors, (0), 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 09:51:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1174 transitions. [2021-12-15 09:51:23,718 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1174 transitions. Word has length 65 [2021-12-15 09:51:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:23,719 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1174 transitions. [2021-12-15 09:51:23,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 09:51:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1174 transitions. [2021-12-15 09:51:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 09:51:23,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:23,727 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, 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] [2021-12-15 09:51:23,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:51:23,727 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -597315905, now seen corresponding path program 1 times [2021-12-15 09:51:23,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483722386] [2021-12-15 09:51:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:23,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:23,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483722386] [2021-12-15 09:51:23,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483722386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:23,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:23,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:51:23,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398077026] [2021-12-15 09:51:23,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:23,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:23,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:23,818 INFO L87 Difference]: Start difference. First operand 684 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 09:51:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:25,275 INFO L93 Difference]: Finished difference Result 1681 states and 2896 transitions. [2021-12-15 09:51:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-15 09:51:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:25,280 INFO L225 Difference]: With dead ends: 1681 [2021-12-15 09:51:25,280 INFO L226 Difference]: Without dead ends: 999 [2021-12-15 09:51:25,281 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 09:51:25,282 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 254 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:25,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 226 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:51:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-12-15 09:51:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 989. [2021-12-15 09:51:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.6194331983805668) internal successors, (1600), 988 states have internal predecessors, (1600), 0 states have call successors, (0), 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 09:51:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1600 transitions. [2021-12-15 09:51:25,300 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1600 transitions. Word has length 130 [2021-12-15 09:51:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:25,301 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1600 transitions. [2021-12-15 09:51:25,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 09:51:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1600 transitions. [2021-12-15 09:51:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-15 09:51:25,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:25,304 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, 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] [2021-12-15 09:51:25,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:51:25,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash 729994212, now seen corresponding path program 1 times [2021-12-15 09:51:25,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074721496] [2021-12-15 09:51:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:25,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:25,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:25,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074721496] [2021-12-15 09:51:25,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074721496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:25,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:25,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:51:25,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508033961] [2021-12-15 09:51:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:25,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:25,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:25,360 INFO L87 Difference]: Start difference. First operand 989 states and 1600 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 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 09:51:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:26,830 INFO L93 Difference]: Finished difference Result 2574 states and 4255 transitions. [2021-12-15 09:51:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 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 131 [2021-12-15 09:51:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:26,835 INFO L225 Difference]: With dead ends: 2574 [2021-12-15 09:51:26,835 INFO L226 Difference]: Without dead ends: 1587 [2021-12-15 09:51:26,837 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 09:51:26,838 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 249 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:26,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 347 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:51:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-12-15 09:51:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1585. [2021-12-15 09:51:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.3977272727272727) internal successors, (2214), 1584 states have internal predecessors, (2214), 0 states have call successors, (0), 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 09:51:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2214 transitions. [2021-12-15 09:51:26,861 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2214 transitions. Word has length 131 [2021-12-15 09:51:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:26,862 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2214 transitions. [2021-12-15 09:51:26,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 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 09:51:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2214 transitions. [2021-12-15 09:51:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 09:51:26,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:26,867 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:26,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:51:26,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 292340142, now seen corresponding path program 1 times [2021-12-15 09:51:26,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:26,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752889985] [2021-12-15 09:51:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:26,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:26,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752889985] [2021-12-15 09:51:26,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752889985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:26,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:26,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:51:26,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131348090] [2021-12-15 09:51:26,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:26,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:51:26,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:51:26,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:51:26,944 INFO L87 Difference]: Start difference. First operand 1585 states and 2214 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 09:51:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:28,455 INFO L93 Difference]: Finished difference Result 3796 states and 5537 transitions. [2021-12-15 09:51:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:51:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-15 09:51:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:28,475 INFO L225 Difference]: With dead ends: 3796 [2021-12-15 09:51:28,476 INFO L226 Difference]: Without dead ends: 2512 [2021-12-15 09:51:28,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:51:28,480 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 398 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:28,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 339 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:51:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-12-15 09:51:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2185. [2021-12-15 09:51:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 1.3296703296703296) internal successors, (2904), 2184 states have internal predecessors, (2904), 0 states have call successors, (0), 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 09:51:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 2904 transitions. [2021-12-15 09:51:28,513 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 2904 transitions. Word has length 135 [2021-12-15 09:51:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:28,514 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 2904 transitions. [2021-12-15 09:51:28,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 09:51:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 2904 transitions. [2021-12-15 09:51:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-15 09:51:28,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:28,519 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:28,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:51:28,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash 558702324, now seen corresponding path program 1 times [2021-12-15 09:51:28,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:28,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868556015] [2021-12-15 09:51:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:28,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:51:28,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868556015] [2021-12-15 09:51:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868556015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:28,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:28,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:51:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100187822] [2021-12-15 09:51:28,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:28,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:28,631 INFO L87 Difference]: Start difference. First operand 2185 states and 2904 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 09:51:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:29,679 INFO L93 Difference]: Finished difference Result 6170 states and 8284 transitions. [2021-12-15 09:51:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 235 [2021-12-15 09:51:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:29,698 INFO L225 Difference]: With dead ends: 6170 [2021-12-15 09:51:29,699 INFO L226 Difference]: Without dead ends: 3987 [2021-12-15 09:51:29,702 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 09:51:29,702 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:29,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:51:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2021-12-15 09:51:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 3684. [2021-12-15 09:51:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3683 states have (on average 1.25821341297855) internal successors, (4634), 3683 states have internal predecessors, (4634), 0 states have call successors, (0), 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 09:51:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 4634 transitions. [2021-12-15 09:51:29,751 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 4634 transitions. Word has length 235 [2021-12-15 09:51:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:29,751 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 4634 transitions. [2021-12-15 09:51:29,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 09:51:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 4634 transitions. [2021-12-15 09:51:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-15 09:51:29,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:29,756 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:29,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:51:29,757 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1245441651, now seen corresponding path program 1 times [2021-12-15 09:51:29,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045681185] [2021-12-15 09:51:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:29,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:51:29,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045681185] [2021-12-15 09:51:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045681185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:29,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:51:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28715772] [2021-12-15 09:51:29,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:29,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:29,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:29,920 INFO L87 Difference]: Start difference. First operand 3684 states and 4634 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 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 09:51:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:30,974 INFO L93 Difference]: Finished difference Result 7665 states and 9577 transitions. [2021-12-15 09:51:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 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 383 [2021-12-15 09:51:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:30,984 INFO L225 Difference]: With dead ends: 7665 [2021-12-15 09:51:30,984 INFO L226 Difference]: Without dead ends: 3983 [2021-12-15 09:51:30,988 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 09:51:30,989 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:30,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:51:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2021-12-15 09:51:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3983. [2021-12-15 09:51:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 3982 states have (on average 1.2403314917127073) internal successors, (4939), 3982 states have internal predecessors, (4939), 0 states have call successors, (0), 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 09:51:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 4939 transitions. [2021-12-15 09:51:31,035 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 4939 transitions. Word has length 383 [2021-12-15 09:51:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:31,035 INFO L470 AbstractCegarLoop]: Abstraction has 3983 states and 4939 transitions. [2021-12-15 09:51:31,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 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 09:51:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 4939 transitions. [2021-12-15 09:51:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-15 09:51:31,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:31,041 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:31,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:51:31,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash 342717355, now seen corresponding path program 1 times [2021-12-15 09:51:31,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:31,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964238586] [2021-12-15 09:51:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:31,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 09:51:31,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964238586] [2021-12-15 09:51:31,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964238586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:31,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:31,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:31,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442488692] [2021-12-15 09:51:31,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:31,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:31,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:31,193 INFO L87 Difference]: Start difference. First operand 3983 states and 4939 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 09:51:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:32,540 INFO L93 Difference]: Finished difference Result 8861 states and 11333 transitions. [2021-12-15 09:51:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 426 [2021-12-15 09:51:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:32,554 INFO L225 Difference]: With dead ends: 8861 [2021-12-15 09:51:32,554 INFO L226 Difference]: Without dead ends: 5179 [2021-12-15 09:51:32,558 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 09:51:32,558 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 249 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:32,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:51:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-12-15 09:51:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 3381. [2021-12-15 09:51:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.26301775147929) internal successors, (4269), 3380 states have internal predecessors, (4269), 0 states have call successors, (0), 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 09:51:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4269 transitions. [2021-12-15 09:51:32,621 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4269 transitions. Word has length 426 [2021-12-15 09:51:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4269 transitions. [2021-12-15 09:51:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 09:51:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4269 transitions. [2021-12-15 09:51:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-15 09:51:32,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:32,626 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:32,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:51:32,627 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1686545730, now seen corresponding path program 1 times [2021-12-15 09:51:32,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583594600] [2021-12-15 09:51:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:32,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:32,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583594600] [2021-12-15 09:51:32,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583594600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:32,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:32,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:32,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075556997] [2021-12-15 09:51:32,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:32,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:32,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:32,776 INFO L87 Difference]: Start difference. First operand 3381 states and 4269 transitions. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 09:51:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:34,049 INFO L93 Difference]: Finished difference Result 8259 states and 10703 transitions. [2021-12-15 09:51:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 430 [2021-12-15 09:51:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:34,067 INFO L225 Difference]: With dead ends: 8259 [2021-12-15 09:51:34,067 INFO L226 Difference]: Without dead ends: 5179 [2021-12-15 09:51:34,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:34,071 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 248 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:34,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:51:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-12-15 09:51:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 4879. [2021-12-15 09:51:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 4878 states have (on average 1.2882328823288234) internal successors, (6284), 4878 states have internal predecessors, (6284), 0 states have call successors, (0), 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 09:51:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6284 transitions. [2021-12-15 09:51:34,138 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6284 transitions. Word has length 430 [2021-12-15 09:51:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 4879 states and 6284 transitions. [2021-12-15 09:51:34,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 09:51:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6284 transitions. [2021-12-15 09:51:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-12-15 09:51:34,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:34,147 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:34,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:51:34,148 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1004226318, now seen corresponding path program 1 times [2021-12-15 09:51:34,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:34,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637471484] [2021-12-15 09:51:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:34,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 294 proven. 75 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:51:34,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637471484] [2021-12-15 09:51:34,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637471484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:51:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130818402] [2021-12-15 09:51:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:34,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:51:34,410 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 09:51:34,411 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 09:51:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:51:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:51:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:51:35,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:51:35,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130818402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:35,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:51:35,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:51:35,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165973956] [2021-12-15 09:51:35,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:35,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:35,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:35,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:51:35,159 INFO L87 Difference]: Start difference. First operand 4879 states and 6284 transitions. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 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 09:51:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:36,408 INFO L93 Difference]: Finished difference Result 10959 states and 14294 transitions. [2021-12-15 09:51:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 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 505 [2021-12-15 09:51:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:36,422 INFO L225 Difference]: With dead ends: 10959 [2021-12-15 09:51:36,423 INFO L226 Difference]: Without dead ends: 6381 [2021-12-15 09:51:36,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:51:36,428 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 249 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:36,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 343 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:51:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6381 states. [2021-12-15 09:51:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6381 to 6378. [2021-12-15 09:51:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6377 states have (on average 1.2551356437196173) internal successors, (8004), 6377 states have internal predecessors, (8004), 0 states have call successors, (0), 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 09:51:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 8004 transitions. [2021-12-15 09:51:36,520 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 8004 transitions. Word has length 505 [2021-12-15 09:51:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:36,520 INFO L470 AbstractCegarLoop]: Abstraction has 6378 states and 8004 transitions. [2021-12-15 09:51:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 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 09:51:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 8004 transitions. [2021-12-15 09:51:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-15 09:51:36,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:36,527 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:36,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:51:36,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:36,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash 83607801, now seen corresponding path program 1 times [2021-12-15 09:51:36,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:36,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646972561] [2021-12-15 09:51:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:36,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 511 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:51:36,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646972561] [2021-12-15 09:51:36,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646972561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:51:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153531610] [2021-12-15 09:51:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:36,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:36,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:51:36,903 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 09:51:36,905 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 09:51:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:37,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:51:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:51:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 511 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:51:38,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:51:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 511 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:51:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153531610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:51:39,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:51:39,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 09:51:39,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757031037] [2021-12-15 09:51:39,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:51:39,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:51:39,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:51:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:51:39,175 INFO L87 Difference]: Start difference. First operand 6378 states and 8004 transitions. Second operand has 9 states, 9 states have (on average 74.77777777777777) internal successors, (673), 8 states have internal predecessors, (673), 0 states have call successors, (0), 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 09:51:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:45,341 INFO L93 Difference]: Finished difference Result 19295 states and 23926 transitions. [2021-12-15 09:51:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 09:51:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 74.77777777777777) internal successors, (673), 8 states have internal predecessors, (673), 0 states have call successors, (0), 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 522 [2021-12-15 09:51:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:45,366 INFO L225 Difference]: With dead ends: 19295 [2021-12-15 09:51:45,367 INFO L226 Difference]: Without dead ends: 9071 [2021-12-15 09:51:45,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1039 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-15 09:51:45,371 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 2433 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 8485 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 9163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 8485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:45,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2433 Valid, 416 Invalid, 9163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 8485 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-15 09:51:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9071 states. [2021-12-15 09:51:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9071 to 9067. [2021-12-15 09:51:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9067 states, 9066 states have (on average 1.1162585484226781) internal successors, (10120), 9066 states have internal predecessors, (10120), 0 states have call successors, (0), 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 09:51:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9067 states to 9067 states and 10120 transitions. [2021-12-15 09:51:45,449 INFO L78 Accepts]: Start accepts. Automaton has 9067 states and 10120 transitions. Word has length 522 [2021-12-15 09:51:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:45,450 INFO L470 AbstractCegarLoop]: Abstraction has 9067 states and 10120 transitions. [2021-12-15 09:51:45,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 74.77777777777777) internal successors, (673), 8 states have internal predecessors, (673), 0 states have call successors, (0), 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 09:51:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 9067 states and 10120 transitions. [2021-12-15 09:51:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-15 09:51:45,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:45,455 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:45,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:51:45,668 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,SelfDestructingSolverStorable9 [2021-12-15 09:51:45,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:45,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1503626002, now seen corresponding path program 1 times [2021-12-15 09:51:45,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:45,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850166660] [2021-12-15 09:51:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:45,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 09:51:45,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850166660] [2021-12-15 09:51:45,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850166660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:45,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:45,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:45,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213455262] [2021-12-15 09:51:45,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:45,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:45,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:45,808 INFO L87 Difference]: Start difference. First operand 9067 states and 10120 transitions. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 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 09:51:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:46,733 INFO L93 Difference]: Finished difference Result 19029 states and 21312 transitions. [2021-12-15 09:51:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 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 537 [2021-12-15 09:51:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:46,768 INFO L225 Difference]: With dead ends: 19029 [2021-12-15 09:51:46,768 INFO L226 Difference]: Without dead ends: 10263 [2021-12-15 09:51:46,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:46,791 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 278 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:46,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 126 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:51:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-12-15 09:51:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10263. [2021-12-15 09:51:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 1.104073280062366) internal successors, (11330), 10262 states have internal predecessors, (11330), 0 states have call successors, (0), 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 09:51:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 11330 transitions. [2021-12-15 09:51:46,925 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 11330 transitions. Word has length 537 [2021-12-15 09:51:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:46,926 INFO L470 AbstractCegarLoop]: Abstraction has 10263 states and 11330 transitions. [2021-12-15 09:51:46,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 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 09:51:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 11330 transitions. [2021-12-15 09:51:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2021-12-15 09:51:46,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:46,931 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:46,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:51:46,931 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash -255819651, now seen corresponding path program 1 times [2021-12-15 09:51:46,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:46,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415273717] [2021-12-15 09:51:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:46,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-15 09:51:47,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:47,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415273717] [2021-12-15 09:51:47,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415273717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:47,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:47,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:47,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140495410] [2021-12-15 09:51:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:47,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:47,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:47,044 INFO L87 Difference]: Start difference. First operand 10263 states and 11330 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 09:51:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:47,867 INFO L93 Difference]: Finished difference Result 24109 states and 26711 transitions. [2021-12-15 09:51:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 539 [2021-12-15 09:51:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:47,884 INFO L225 Difference]: With dead ends: 24109 [2021-12-15 09:51:47,884 INFO L226 Difference]: Without dead ends: 13848 [2021-12-15 09:51:47,892 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 09:51:47,892 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 270 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:47,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 178 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:51:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13848 states. [2021-12-15 09:51:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13848 to 12951. [2021-12-15 09:51:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12951 states, 12950 states have (on average 1.0885714285714285) internal successors, (14097), 12950 states have internal predecessors, (14097), 0 states have call successors, (0), 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 09:51:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12951 states to 12951 states and 14097 transitions. [2021-12-15 09:51:48,011 INFO L78 Accepts]: Start accepts. Automaton has 12951 states and 14097 transitions. Word has length 539 [2021-12-15 09:51:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:48,012 INFO L470 AbstractCegarLoop]: Abstraction has 12951 states and 14097 transitions. [2021-12-15 09:51:48,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 09:51:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12951 states and 14097 transitions. [2021-12-15 09:51:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-12-15 09:51:48,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:48,019 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:48,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:51:48,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1303882531, now seen corresponding path program 1 times [2021-12-15 09:51:48,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159292866] [2021-12-15 09:51:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:48,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 295 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:48,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159292866] [2021-12-15 09:51:48,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159292866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:51:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188594254] [2021-12-15 09:51:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:48,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:51:48,241 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 09:51:48,242 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 09:51:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:48,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:51:48,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:51:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 09:51:48,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:51:48,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188594254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:48,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:51:48,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 09:51:48,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641829331] [2021-12-15 09:51:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:48,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:48,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:51:48,978 INFO L87 Difference]: Start difference. First operand 12951 states and 14097 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 09:51:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:49,737 INFO L93 Difference]: Finished difference Result 25603 states and 27896 transitions. [2021-12-15 09:51:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 562 [2021-12-15 09:51:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:49,751 INFO L225 Difference]: With dead ends: 25603 [2021-12-15 09:51:49,751 INFO L226 Difference]: Without dead ends: 12953 [2021-12-15 09:51:49,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:51:49,764 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 247 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:49,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 453 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:51:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12953 states. [2021-12-15 09:51:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12953 to 12651. [2021-12-15 09:51:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 1.0584189723320159) internal successors, (13389), 12650 states have internal predecessors, (13389), 0 states have call successors, (0), 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 09:51:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 13389 transitions. [2021-12-15 09:51:49,937 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 13389 transitions. Word has length 562 [2021-12-15 09:51:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:49,938 INFO L470 AbstractCegarLoop]: Abstraction has 12651 states and 13389 transitions. [2021-12-15 09:51:49,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 09:51:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 13389 transitions. [2021-12-15 09:51:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2021-12-15 09:51:49,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:49,943 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:49,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:51:50,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:50,161 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:50,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash 241840910, now seen corresponding path program 1 times [2021-12-15 09:51:50,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400558128] [2021-12-15 09:51:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:50,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 444 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 09:51:50,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:50,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400558128] [2021-12-15 09:51:50,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400558128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:50,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:50,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:50,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232053857] [2021-12-15 09:51:50,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:50,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:50,332 INFO L87 Difference]: Start difference. First operand 12651 states and 13389 transitions. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 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 09:51:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:51,294 INFO L93 Difference]: Finished difference Result 28888 states and 30629 transitions. [2021-12-15 09:51:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 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 592 [2021-12-15 09:51:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:51,316 INFO L225 Difference]: With dead ends: 28888 [2021-12-15 09:51:51,316 INFO L226 Difference]: Without dead ends: 16538 [2021-12-15 09:51:51,325 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 09:51:51,325 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:51,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 161 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:51:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16538 states. [2021-12-15 09:51:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16538 to 14445. [2021-12-15 09:51:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14445 states, 14444 states have (on average 1.059817225145389) internal successors, (15308), 14444 states have internal predecessors, (15308), 0 states have call successors, (0), 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 09:51:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14445 states to 14445 states and 15308 transitions. [2021-12-15 09:51:51,551 INFO L78 Accepts]: Start accepts. Automaton has 14445 states and 15308 transitions. Word has length 592 [2021-12-15 09:51:51,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:51,551 INFO L470 AbstractCegarLoop]: Abstraction has 14445 states and 15308 transitions. [2021-12-15 09:51:51,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 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 09:51:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14445 states and 15308 transitions. [2021-12-15 09:51:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2021-12-15 09:51:51,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:51,556 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:51:51,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:51:51,557 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2071206007, now seen corresponding path program 1 times [2021-12-15 09:51:51,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:51,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612049201] [2021-12-15 09:51:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:51,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 125 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:51,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612049201] [2021-12-15 09:51:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612049201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:51:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825310433] [2021-12-15 09:51:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:51,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:51:51,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:51:51,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:51:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:51,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:51:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:51:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:51:52,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:51:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825310433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:52,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:51:52,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:51:52,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158801125] [2021-12-15 09:51:52,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:52,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:52,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:51:52,674 INFO L87 Difference]: Start difference. First operand 14445 states and 15308 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 09:51:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:53,402 INFO L93 Difference]: Finished difference Result 28591 states and 30317 transitions. [2021-12-15 09:51:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:53,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 610 [2021-12-15 09:51:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:53,417 INFO L225 Difference]: With dead ends: 28591 [2021-12-15 09:51:53,418 INFO L226 Difference]: Without dead ends: 14447 [2021-12-15 09:51:53,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:51:53,426 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 107 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:53,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 400 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:51:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14447 states. [2021-12-15 09:51:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14447 to 14442. [2021-12-15 09:51:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14442 states, 14441 states have (on average 1.0556055674814764) internal successors, (15244), 14441 states have internal predecessors, (15244), 0 states have call successors, (0), 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 09:51:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14442 states to 14442 states and 15244 transitions. [2021-12-15 09:51:53,543 INFO L78 Accepts]: Start accepts. Automaton has 14442 states and 15244 transitions. Word has length 610 [2021-12-15 09:51:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:53,543 INFO L470 AbstractCegarLoop]: Abstraction has 14442 states and 15244 transitions. [2021-12-15 09:51:53,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 09:51:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 14442 states and 15244 transitions. [2021-12-15 09:51:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-12-15 09:51:53,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:53,550 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:53,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:51:53,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 09:51:53,767 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash 410633746, now seen corresponding path program 1 times [2021-12-15 09:51:53,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079305433] [2021-12-15 09:51:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:53,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-15 09:51:53,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:53,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079305433] [2021-12-15 09:51:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079305433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:53,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:53,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:51:53,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73523488] [2021-12-15 09:51:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:53,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:51:53,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:51:53,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:51:53,942 INFO L87 Difference]: Start difference. First operand 14442 states and 15244 transitions. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 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 09:51:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:55,218 INFO L93 Difference]: Finished difference Result 30685 states and 32384 transitions. [2021-12-15 09:51:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:51:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 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 686 [2021-12-15 09:51:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:55,232 INFO L225 Difference]: With dead ends: 30685 [2021-12-15 09:51:55,233 INFO L226 Difference]: Without dead ends: 16544 [2021-12-15 09:51:55,241 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 09:51:55,241 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 585 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:55,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 440 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:51:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16544 states. [2021-12-15 09:51:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16544 to 16541. [2021-12-15 09:51:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16541 states, 16540 states have (on average 1.043409915356711) internal successors, (17258), 16540 states have internal predecessors, (17258), 0 states have call successors, (0), 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 09:51:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16541 states to 16541 states and 17258 transitions. [2021-12-15 09:51:55,418 INFO L78 Accepts]: Start accepts. Automaton has 16541 states and 17258 transitions. Word has length 686 [2021-12-15 09:51:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:55,419 INFO L470 AbstractCegarLoop]: Abstraction has 16541 states and 17258 transitions. [2021-12-15 09:51:55,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 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 09:51:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16541 states and 17258 transitions. [2021-12-15 09:51:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2021-12-15 09:51:55,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:55,427 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:51:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:51:55,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1624574917, now seen corresponding path program 1 times [2021-12-15 09:51:55,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131375238] [2021-12-15 09:51:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:55,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 566 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-12-15 09:51:55,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131375238] [2021-12-15 09:51:55,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131375238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:55,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:55,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:55,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241457555] [2021-12-15 09:51:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:55,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:55,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:55,553 INFO L87 Difference]: Start difference. First operand 16541 states and 17258 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 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 09:51:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:56,308 INFO L93 Difference]: Finished difference Result 32778 states and 34202 transitions. [2021-12-15 09:51:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 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 716 [2021-12-15 09:51:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:56,323 INFO L225 Difference]: With dead ends: 32778 [2021-12-15 09:51:56,323 INFO L226 Difference]: Without dead ends: 16538 [2021-12-15 09:51:56,333 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 09:51:56,333 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:56,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:51:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16538 states. [2021-12-15 09:51:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16538 to 16238. [2021-12-15 09:51:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16238 states, 16237 states have (on average 1.0426187103528977) internal successors, (16929), 16237 states have internal predecessors, (16929), 0 states have call successors, (0), 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 09:51:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16238 states to 16238 states and 16929 transitions. [2021-12-15 09:51:56,544 INFO L78 Accepts]: Start accepts. Automaton has 16238 states and 16929 transitions. Word has length 716 [2021-12-15 09:51:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:56,544 INFO L470 AbstractCegarLoop]: Abstraction has 16238 states and 16929 transitions. [2021-12-15 09:51:56,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 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 09:51:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16238 states and 16929 transitions. [2021-12-15 09:51:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2021-12-15 09:51:56,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:56,554 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:56,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:51:56,554 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash 908850648, now seen corresponding path program 1 times [2021-12-15 09:51:56,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:56,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623726966] [2021-12-15 09:51:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:56,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2021-12-15 09:51:56,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623726966] [2021-12-15 09:51:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623726966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:56,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:56,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:56,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193562617] [2021-12-15 09:51:56,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:56,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:56,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:56,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:56,719 INFO L87 Difference]: Start difference. First operand 16238 states and 16929 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 09:51:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:57,639 INFO L93 Difference]: Finished difference Result 38468 states and 40112 transitions. [2021-12-15 09:51:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 726 [2021-12-15 09:51:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:57,659 INFO L225 Difference]: With dead ends: 38468 [2021-12-15 09:51:57,659 INFO L226 Difference]: Without dead ends: 22531 [2021-12-15 09:51:57,663 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 09:51:57,664 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 347 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:57,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 127 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:51:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22531 states. [2021-12-15 09:51:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22531 to 18629. [2021-12-15 09:51:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18629 states, 18628 states have (on average 1.0403693364827142) internal successors, (19380), 18628 states have internal predecessors, (19380), 0 states have call successors, (0), 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 09:51:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18629 states to 18629 states and 19380 transitions. [2021-12-15 09:51:57,822 INFO L78 Accepts]: Start accepts. Automaton has 18629 states and 19380 transitions. Word has length 726 [2021-12-15 09:51:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:57,822 INFO L470 AbstractCegarLoop]: Abstraction has 18629 states and 19380 transitions. [2021-12-15 09:51:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 09:51:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 18629 states and 19380 transitions. [2021-12-15 09:51:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-12-15 09:51:57,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:57,830 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:57,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:51:57,831 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1141807771, now seen corresponding path program 1 times [2021-12-15 09:51:57,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:57,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70490530] [2021-12-15 09:51:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:57,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 626 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-15 09:51:57,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70490530] [2021-12-15 09:51:57,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70490530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:51:57,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:51:57,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:51:57,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068665951] [2021-12-15 09:51:58,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:51:58,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:51:58,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:51:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:51:58,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:51:58,002 INFO L87 Difference]: Start difference. First operand 18629 states and 19380 transitions. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 09:51:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:51:58,813 INFO L93 Difference]: Finished difference Result 36961 states and 38463 transitions. [2021-12-15 09:51:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:51:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 750 [2021-12-15 09:51:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:51:58,830 INFO L225 Difference]: With dead ends: 36961 [2021-12-15 09:51:58,830 INFO L226 Difference]: Without dead ends: 18633 [2021-12-15 09:51:58,840 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 09:51:58,840 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:51:58,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 109 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:51:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18633 states. [2021-12-15 09:51:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18633 to 18629. [2021-12-15 09:51:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18629 states, 18628 states have (on average 1.0343031994846468) internal successors, (19267), 18628 states have internal predecessors, (19267), 0 states have call successors, (0), 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 09:51:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18629 states to 18629 states and 19267 transitions. [2021-12-15 09:51:58,979 INFO L78 Accepts]: Start accepts. Automaton has 18629 states and 19267 transitions. Word has length 750 [2021-12-15 09:51:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:51:58,980 INFO L470 AbstractCegarLoop]: Abstraction has 18629 states and 19267 transitions. [2021-12-15 09:51:58,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 09:51:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 18629 states and 19267 transitions. [2021-12-15 09:51:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2021-12-15 09:51:58,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:51:58,988 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:58,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:51:58,988 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:51:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:51:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash -586254201, now seen corresponding path program 1 times [2021-12-15 09:51:58,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:51:58,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923121290] [2021-12-15 09:51:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:58,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:51:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 583 proven. 188 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-15 09:51:59,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:51:59,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923121290] [2021-12-15 09:51:59,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923121290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:51:59,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140741267] [2021-12-15 09:51:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:51:59,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:51:59,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:51:59,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:51:59,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:51:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:51:59,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:51:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-15 09:52:02,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:52:02,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140741267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:02,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:52:02,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:52:02,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94997736] [2021-12-15 09:52:02,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:02,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:02,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:02,057 INFO L87 Difference]: Start difference. First operand 18629 states and 19267 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 09:52:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:02,122 INFO L93 Difference]: Finished difference Result 18694 states and 19332 transitions. [2021-12-15 09:52:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 756 [2021-12-15 09:52:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:02,138 INFO L225 Difference]: With dead ends: 18694 [2021-12-15 09:52:02,138 INFO L226 Difference]: Without dead ends: 18692 [2021-12-15 09:52:02,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:02,143 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:02,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 510 Unchecked, 0.0s Time] [2021-12-15 09:52:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18692 states. [2021-12-15 09:52:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18692 to 18692. [2021-12-15 09:52:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18692 states, 18691 states have (on average 1.0341875769086726) internal successors, (19330), 18691 states have internal predecessors, (19330), 0 states have call successors, (0), 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 09:52:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18692 states to 18692 states and 19330 transitions. [2021-12-15 09:52:02,304 INFO L78 Accepts]: Start accepts. Automaton has 18692 states and 19330 transitions. Word has length 756 [2021-12-15 09:52:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:02,305 INFO L470 AbstractCegarLoop]: Abstraction has 18692 states and 19330 transitions. [2021-12-15 09:52:02,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 09:52:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 18692 states and 19330 transitions. [2021-12-15 09:52:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-12-15 09:52:02,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:02,317 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:02,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:52:02,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:02,532 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1037429821, now seen corresponding path program 1 times [2021-12-15 09:52:02,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:02,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095222165] [2021-12-15 09:52:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:02,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-12-15 09:52:02,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095222165] [2021-12-15 09:52:02,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095222165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:02,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:02,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:02,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062436002] [2021-12-15 09:52:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:02,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:02,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:02,718 INFO L87 Difference]: Start difference. First operand 18692 states and 19330 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 09:52:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:03,625 INFO L93 Difference]: Finished difference Result 42178 states and 43622 transitions. [2021-12-15 09:52:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:03,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 811 [2021-12-15 09:52:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:03,647 INFO L225 Difference]: With dead ends: 42178 [2021-12-15 09:52:03,648 INFO L226 Difference]: Without dead ends: 23787 [2021-12-15 09:52:03,658 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 09:52:03,659 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 225 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:03,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 467 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23787 states. [2021-12-15 09:52:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23787 to 18092. [2021-12-15 09:52:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18092 states, 18091 states have (on average 1.0343264606710518) internal successors, (18712), 18091 states have internal predecessors, (18712), 0 states have call successors, (0), 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 09:52:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18092 states to 18092 states and 18712 transitions. [2021-12-15 09:52:03,838 INFO L78 Accepts]: Start accepts. Automaton has 18092 states and 18712 transitions. Word has length 811 [2021-12-15 09:52:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:03,838 INFO L470 AbstractCegarLoop]: Abstraction has 18092 states and 18712 transitions. [2021-12-15 09:52:03,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 09:52:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 18092 states and 18712 transitions. [2021-12-15 09:52:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2021-12-15 09:52:03,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:03,848 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:03,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:52:03,848 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -176504871, now seen corresponding path program 1 times [2021-12-15 09:52:03,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:03,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481170582] [2021-12-15 09:52:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:03,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 714 proven. 0 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-12-15 09:52:04,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:04,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481170582] [2021-12-15 09:52:04,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481170582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:04,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:04,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:04,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320645638] [2021-12-15 09:52:04,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:04,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:04,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:04,045 INFO L87 Difference]: Start difference. First operand 18092 states and 18712 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 09:52:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:04,789 INFO L93 Difference]: Finished difference Result 33157 states and 34261 transitions. [2021-12-15 09:52:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 813 [2021-12-15 09:52:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:04,804 INFO L225 Difference]: With dead ends: 33157 [2021-12-15 09:52:04,804 INFO L226 Difference]: Without dead ends: 15366 [2021-12-15 09:52:04,813 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 09:52:04,814 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 224 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:04,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 381 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:52:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15366 states. [2021-12-15 09:52:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15366 to 12971. [2021-12-15 09:52:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12971 states, 12970 states have (on average 1.030300693909021) internal successors, (13363), 12970 states have internal predecessors, (13363), 0 states have call successors, (0), 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 09:52:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12971 states to 12971 states and 13363 transitions. [2021-12-15 09:52:04,977 INFO L78 Accepts]: Start accepts. Automaton has 12971 states and 13363 transitions. Word has length 813 [2021-12-15 09:52:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:04,978 INFO L470 AbstractCegarLoop]: Abstraction has 12971 states and 13363 transitions. [2021-12-15 09:52:04,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 09:52:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 12971 states and 13363 transitions. [2021-12-15 09:52:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2021-12-15 09:52:04,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:04,987 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:04,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 09:52:04,987 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1105125242, now seen corresponding path program 1 times [2021-12-15 09:52:04,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:04,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650414509] [2021-12-15 09:52:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:04,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2021-12-15 09:52:05,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650414509] [2021-12-15 09:52:05,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650414509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:05,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:05,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873790632] [2021-12-15 09:52:05,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:05,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:05,153 INFO L87 Difference]: Start difference. First operand 12971 states and 13363 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 09:52:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:05,830 INFO L93 Difference]: Finished difference Result 25938 states and 26732 transitions. [2021-12-15 09:52:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 841 [2021-12-15 09:52:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:05,842 INFO L225 Difference]: With dead ends: 25938 [2021-12-15 09:52:05,842 INFO L226 Difference]: Without dead ends: 12969 [2021-12-15 09:52:05,849 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 09:52:05,850 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 322 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:05,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 426 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:52:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12969 states. [2021-12-15 09:52:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12969 to 11771. [2021-12-15 09:52:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11771 states, 11770 states have (on average 1.0258283772302463) internal successors, (12074), 11770 states have internal predecessors, (12074), 0 states have call successors, (0), 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 09:52:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 12074 transitions. [2021-12-15 09:52:05,941 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 12074 transitions. Word has length 841 [2021-12-15 09:52:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:05,941 INFO L470 AbstractCegarLoop]: Abstraction has 11771 states and 12074 transitions. [2021-12-15 09:52:05,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 09:52:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 12074 transitions. [2021-12-15 09:52:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1056 [2021-12-15 09:52:05,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:05,956 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:52:05,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 09:52:05,957 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash 896448912, now seen corresponding path program 1 times [2021-12-15 09:52:05,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:05,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577090906] [2021-12-15 09:52:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:05,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 939 proven. 63 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-15 09:52:06,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577090906] [2021-12-15 09:52:06,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577090906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908216599] [2021-12-15 09:52:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:06,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:06,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:06,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:52:06,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:52:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:06,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:52:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 939 proven. 63 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-15 09:52:09,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:52:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 939 proven. 63 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-15 09:52:13,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908216599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:52:13,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:52:13,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-15 09:52:13,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82094793] [2021-12-15 09:52:13,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:52:13,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:52:13,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:13,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:52:13,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:52:13,535 INFO L87 Difference]: Start difference. First operand 11771 states and 12074 transitions. Second operand has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 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 09:52:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:14,660 INFO L93 Difference]: Finished difference Result 24136 states and 24759 transitions. [2021-12-15 09:52:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:52:14,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 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 1055 [2021-12-15 09:52:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:14,661 INFO L225 Difference]: With dead ends: 24136 [2021-12-15 09:52:14,661 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 09:52:14,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2114 GetRequests, 2110 SyntacticMatches, 1 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 09:52:14,669 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 278 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:14,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 59 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:52:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 09:52:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 09:52:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 09:52:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 09:52:14,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1055 [2021-12-15 09:52:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:14,670 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 09:52:14,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 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 09:52:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 09:52:14,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 09:52:14,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 09:52:14,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:52:14,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:14,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.