./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label37.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 a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:40:10,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:40:10,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:40:10,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:40:10,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:40:10,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:40:10,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:40:10,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:40:10,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:40:10,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:40:10,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:40:10,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:40:10,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:40:10,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:40:10,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:40:10,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:40:10,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:40:10,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:40:10,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:40:10,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:40:10,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:40:10,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:40:10,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:40:10,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:40:10,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:40:10,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:40:10,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:40:10,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:40:10,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:40:10,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:40:10,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:40:10,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:40:10,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:40:10,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:40:10,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:40:10,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:40:10,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:40:10,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:40:10,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:40:10,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:40:10,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:40:10,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:40:10,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:40:10,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:40:10,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:40:10,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:40:10,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:40:10,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:40:10,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:40:10,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:40:10,432 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:40:10,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:40:10,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:40:10,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:40:10,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:40:10,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:40:10,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:40:10,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:40:10,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:40:10,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:40:10,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:40:10,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:40:10,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:40:10,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:40:10,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:40:10,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:40:10,435 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:40:10,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:40:10,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:40:10,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:40:10,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e [2021-12-17 04:40:10,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:40:10,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:40:10,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:40:10,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:40:10,668 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:40:10,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2021-12-17 04:40:10,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23dd5b5b1/53c50db836e448de86790a55aedd3c4a/FLAG3c67c96cc [2021-12-17 04:40:11,246 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:40:11,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2021-12-17 04:40:11,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23dd5b5b1/53c50db836e448de86790a55aedd3c4a/FLAG3c67c96cc [2021-12-17 04:40:11,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23dd5b5b1/53c50db836e448de86790a55aedd3c4a [2021-12-17 04:40:11,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:40:11,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:40:11,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:40:11,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:40:11,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:40:11,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:40:11" (1/1) ... [2021-12-17 04:40:11,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e0d7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:11, skipping insertion in model container [2021-12-17 04:40:11,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:40:11" (1/1) ... [2021-12-17 04:40:11,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:40:11,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:40:11,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2021-12-17 04:40:12,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:40:12,480 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:40:12,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2021-12-17 04:40:13,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:40:13,028 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:40:13,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13 WrapperNode [2021-12-17 04:40:13,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:40:13,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:40:13,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:40:13,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:40:13,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:13,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:13,580 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:40:13,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:40:13,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:40:13,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:40:13,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:40:13,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:13,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:13,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:13,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:14,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:14,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:14,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:14,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:40:14,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:40:14,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:40:14,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:40:14,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (1/1) ... [2021-12-17 04:40:14,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:40:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:40:14,365 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) [2021-12-17 04:40:14,389 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 [2021-12-17 04:40:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:40:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:40:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:40:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:40:14,450 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:40:14,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:40:17,790 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:40:17,802 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:40:17,802 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:40:17,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:40:17 BoogieIcfgContainer [2021-12-17 04:40:17,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:40:17,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:40:17,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:40:17,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:40:17,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:40:11" (1/3) ... [2021-12-17 04:40:17,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afe58f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:40:17, skipping insertion in model container [2021-12-17 04:40:17,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:13" (2/3) ... [2021-12-17 04:40:17,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afe58f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:40:17, skipping insertion in model container [2021-12-17 04:40:17,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:40:17" (3/3) ... [2021-12-17 04:40:17,811 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label37.c [2021-12-17 04:40:17,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:40:17,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:40:17,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:40:17,853 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 [2021-12-17 04:40:17,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:40:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 04:40:17,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:17,884 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] [2021-12-17 04:40:17,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-12-17 04:40:17,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653584468] [2021-12-17 04:40:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:17,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:18,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653584468] [2021-12-17 04:40:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653584468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:18,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:18,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:18,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993343924] [2021-12-17 04:40:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:18,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:18,132 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:21,945 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-17 04:40:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-17 04:40:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:21,980 INFO L225 Difference]: With dead ends: 3121 [2021-12-17 04:40:21,980 INFO L226 Difference]: Without dead ends: 1944 [2021-12-17 04:40:21,985 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 [2021-12-17 04:40:21,987 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 935 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:21,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 04:40:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-17 04:40:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-17 04:40:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-17 04:40:22,063 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 54 [2021-12-17 04:40:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:22,063 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-17 04:40:22,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-17 04:40:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 04:40:22,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:22,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:22,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:40:22,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash 916312146, now seen corresponding path program 1 times [2021-12-17 04:40:22,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:22,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648105864] [2021-12-17 04:40:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:22,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:22,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:22,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648105864] [2021-12-17 04:40:22,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648105864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:22,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:22,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:22,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560801835] [2021-12-17 04:40:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:22,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:40:22,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:40:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:40:22,180 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:26,903 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-17 04:40:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:40:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-17 04:40:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:26,915 INFO L225 Difference]: With dead ends: 6152 [2021-12-17 04:40:26,915 INFO L226 Difference]: Without dead ends: 4281 [2021-12-17 04:40:26,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:40:26,922 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 2628 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:26,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 1017 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 04:40:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-17 04:40:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-17 04:40:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4774480018695957) internal successors, (6322), 4279 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6322 transitions. [2021-12-17 04:40:26,982 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6322 transitions. Word has length 119 [2021-12-17 04:40:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:26,985 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6322 transitions. [2021-12-17 04:40:26,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6322 transitions. [2021-12-17 04:40:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-17 04:40:26,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:26,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:26,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:40:26,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1155556459, now seen corresponding path program 1 times [2021-12-17 04:40:26,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779203263] [2021-12-17 04:40:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:27,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 04:40:27,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779203263] [2021-12-17 04:40:27,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779203263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:27,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:27,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:27,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550957358] [2021-12-17 04:40:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:27,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:27,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:27,122 INFO L87 Difference]: Start difference. First operand 4280 states and 6322 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:30,097 INFO L93 Difference]: Finished difference Result 10966 states and 16976 transitions. [2021-12-17 04:40:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 150 [2021-12-17 04:40:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:30,127 INFO L225 Difference]: With dead ends: 10966 [2021-12-17 04:40:30,128 INFO L226 Difference]: Without dead ends: 7475 [2021-12-17 04:40:30,134 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 [2021-12-17 04:40:30,140 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 866 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:30,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 830 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:40:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7475 states. [2021-12-17 04:40:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7475 to 7470. [2021-12-17 04:40:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 7469 states have (on average 1.469272995046191) internal successors, (10974), 7469 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10974 transitions. [2021-12-17 04:40:30,245 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10974 transitions. Word has length 150 [2021-12-17 04:40:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:30,247 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 10974 transitions. [2021-12-17 04:40:30,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10974 transitions. [2021-12-17 04:40:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-17 04:40:30,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:30,249 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, 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] [2021-12-17 04:40:30,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:40:30,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash -433299700, now seen corresponding path program 1 times [2021-12-17 04:40:30,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360703616] [2021-12-17 04:40:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:30,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:30,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360703616] [2021-12-17 04:40:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360703616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:30,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:30,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:30,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306693897] [2021-12-17 04:40:30,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:30,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:30,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:30,377 INFO L87 Difference]: Start difference. First operand 7470 states and 10974 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:32,945 INFO L93 Difference]: Finished difference Result 20467 states and 30850 transitions. [2021-12-17 04:40:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-12-17 04:40:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:33,017 INFO L225 Difference]: With dead ends: 20467 [2021-12-17 04:40:33,018 INFO L226 Difference]: Without dead ends: 13786 [2021-12-17 04:40:33,028 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 [2021-12-17 04:40:33,034 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 901 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:33,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 915 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:40:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13786 states. [2021-12-17 04:40:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13786 to 13777. [2021-12-17 04:40:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.3683217189314751) internal successors, (18850), 13776 states have internal predecessors, (18850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18850 transitions. [2021-12-17 04:40:33,359 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18850 transitions. Word has length 217 [2021-12-17 04:40:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:33,359 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18850 transitions. [2021-12-17 04:40:33,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18850 transitions. [2021-12-17 04:40:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-17 04:40:33,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:33,362 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:40:33,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:40:33,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash 519914405, now seen corresponding path program 1 times [2021-12-17 04:40:33,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:33,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386458964] [2021-12-17 04:40:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:33,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 04:40:33,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386458964] [2021-12-17 04:40:33,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386458964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:33,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:33,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:33,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075417676] [2021-12-17 04:40:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:33,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:33,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:33,455 INFO L87 Difference]: Start difference. First operand 13777 states and 18850 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:36,654 INFO L93 Difference]: Finished difference Result 38608 states and 53602 transitions. [2021-12-17 04:40:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:36,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-12-17 04:40:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:36,701 INFO L225 Difference]: With dead ends: 38608 [2021-12-17 04:40:36,702 INFO L226 Difference]: Without dead ends: 25620 [2021-12-17 04:40:36,719 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 [2021-12-17 04:40:36,720 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 946 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:36,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 836 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:40:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25620 states. [2021-12-17 04:40:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25620 to 25609. [2021-12-17 04:40:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25609 states, 25608 states have (on average 1.2739378319275227) internal successors, (32623), 25608 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25609 states to 25609 states and 32623 transitions. [2021-12-17 04:40:37,046 INFO L78 Accepts]: Start accepts. Automaton has 25609 states and 32623 transitions. Word has length 236 [2021-12-17 04:40:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:37,047 INFO L470 AbstractCegarLoop]: Abstraction has 25609 states and 32623 transitions. [2021-12-17 04:40:37,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25609 states and 32623 transitions. [2021-12-17 04:40:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-17 04:40:37,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:37,051 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, 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] [2021-12-17 04:40:37,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:40:37,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash -317526233, now seen corresponding path program 1 times [2021-12-17 04:40:37,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:37,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848895099] [2021-12-17 04:40:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:37,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:40:37,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848895099] [2021-12-17 04:40:37,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848895099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:37,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:37,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:37,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691293658] [2021-12-17 04:40:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:37,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:37,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:37,139 INFO L87 Difference]: Start difference. First operand 25609 states and 32623 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:40,301 INFO L93 Difference]: Finished difference Result 72457 states and 93045 transitions. [2021-12-17 04:40:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 244 [2021-12-17 04:40:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:40,363 INFO L225 Difference]: With dead ends: 72457 [2021-12-17 04:40:40,363 INFO L226 Difference]: Without dead ends: 47637 [2021-12-17 04:40:40,390 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 [2021-12-17 04:40:40,392 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:40,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:40:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47637 states. [2021-12-17 04:40:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47637 to 43696. [2021-12-17 04:40:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43696 states, 43695 states have (on average 1.2124041652362971) internal successors, (52976), 43695 states have internal predecessors, (52976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43696 states to 43696 states and 52976 transitions. [2021-12-17 04:40:40,853 INFO L78 Accepts]: Start accepts. Automaton has 43696 states and 52976 transitions. Word has length 244 [2021-12-17 04:40:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 43696 states and 52976 transitions. [2021-12-17 04:40:40,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 43696 states and 52976 transitions. [2021-12-17 04:40:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-17 04:40:40,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:40,857 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:40,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:40:40,858 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1035956587, now seen corresponding path program 1 times [2021-12-17 04:40:40,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:40,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188504798] [2021-12-17 04:40:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:40,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:40,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188504798] [2021-12-17 04:40:40,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188504798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:40,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:40,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:40,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773089761] [2021-12-17 04:40:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:40,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:40,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:40,955 INFO L87 Difference]: Start difference. First operand 43696 states and 52976 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:44,105 INFO L93 Difference]: Finished difference Result 89734 states and 108406 transitions. [2021-12-17 04:40:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 268 [2021-12-17 04:40:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:44,192 INFO L225 Difference]: With dead ends: 89734 [2021-12-17 04:40:44,201 INFO L226 Difference]: Without dead ends: 46827 [2021-12-17 04:40:44,218 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 [2021-12-17 04:40:44,220 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 1034 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:44,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 1647 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:40:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46827 states. [2021-12-17 04:40:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46827 to 44455. [2021-12-17 04:40:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44455 states, 44454 states have (on average 1.142596841679039) internal successors, (50793), 44454 states have internal predecessors, (50793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44455 states to 44455 states and 50793 transitions. [2021-12-17 04:40:44,626 INFO L78 Accepts]: Start accepts. Automaton has 44455 states and 50793 transitions. Word has length 268 [2021-12-17 04:40:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:44,628 INFO L470 AbstractCegarLoop]: Abstraction has 44455 states and 50793 transitions. [2021-12-17 04:40:44,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44455 states and 50793 transitions. [2021-12-17 04:40:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-12-17 04:40:44,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:44,634 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:40:44,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:40:44,635 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1271299818, now seen corresponding path program 1 times [2021-12-17 04:40:44,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034898585] [2021-12-17 04:40:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:44,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:44,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:44,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034898585] [2021-12-17 04:40:44,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034898585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:44,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:44,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:44,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646541228] [2021-12-17 04:40:44,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:44,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:40:44,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:40:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:40:44,933 INFO L87 Difference]: Start difference. First operand 44455 states and 50793 transitions. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:48,124 INFO L93 Difference]: Finished difference Result 84179 states and 96683 transitions. [2021-12-17 04:40:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:40:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 345 [2021-12-17 04:40:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:48,167 INFO L225 Difference]: With dead ends: 84179 [2021-12-17 04:40:48,167 INFO L226 Difference]: Without dead ends: 46814 [2021-12-17 04:40:48,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:40:48,182 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 1512 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 4083 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 4703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 4083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:48,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1056 Invalid, 4703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 4083 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:40:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46814 states. [2021-12-17 04:40:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46814 to 43661. [2021-12-17 04:40:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43661 states, 43660 states have (on average 1.1300732936326157) internal successors, (49339), 43660 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43661 states to 43661 states and 49339 transitions. [2021-12-17 04:40:48,682 INFO L78 Accepts]: Start accepts. Automaton has 43661 states and 49339 transitions. Word has length 345 [2021-12-17 04:40:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:48,682 INFO L470 AbstractCegarLoop]: Abstraction has 43661 states and 49339 transitions. [2021-12-17 04:40:48,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 43661 states and 49339 transitions. [2021-12-17 04:40:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-12-17 04:40:48,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:48,688 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:40:48,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:40:48,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 673574055, now seen corresponding path program 1 times [2021-12-17 04:40:48,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309312297] [2021-12-17 04:40:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:48,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 04:40:48,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309312297] [2021-12-17 04:40:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309312297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:48,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:48,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:48,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889894257] [2021-12-17 04:40:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:48,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:48,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:48,807 INFO L87 Difference]: Start difference. First operand 43661 states and 49339 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:51,704 INFO L93 Difference]: Finished difference Result 103878 states and 116832 transitions. [2021-12-17 04:40:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 352 [2021-12-17 04:40:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:51,765 INFO L225 Difference]: With dead ends: 103878 [2021-12-17 04:40:51,765 INFO L226 Difference]: Without dead ends: 60216 [2021-12-17 04:40:51,787 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 [2021-12-17 04:40:51,788 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 766 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:51,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 1805 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:40:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60216 states. [2021-12-17 04:40:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60216 to 60189. [2021-12-17 04:40:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60189 states, 60188 states have (on average 1.1090416694357679) internal successors, (66751), 60188 states have internal predecessors, (66751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60189 states to 60189 states and 66751 transitions. [2021-12-17 04:40:52,370 INFO L78 Accepts]: Start accepts. Automaton has 60189 states and 66751 transitions. Word has length 352 [2021-12-17 04:40:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 60189 states and 66751 transitions. [2021-12-17 04:40:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 60189 states and 66751 transitions. [2021-12-17 04:40:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-17 04:40:52,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:52,375 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:40:52,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:40:52,376 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1146839780, now seen corresponding path program 1 times [2021-12-17 04:40:52,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:52,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493293333] [2021-12-17 04:40:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:52,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:40:52,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:52,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493293333] [2021-12-17 04:40:52,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493293333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:52,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:52,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:52,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933680121] [2021-12-17 04:40:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:52,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:52,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:52,629 INFO L87 Difference]: Start difference. First operand 60189 states and 66751 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:55,609 INFO L93 Difference]: Finished difference Result 138491 states and 155054 transitions. [2021-12-17 04:40:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 379 [2021-12-17 04:40:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:55,700 INFO L225 Difference]: With dead ends: 138491 [2021-12-17 04:40:55,700 INFO L226 Difference]: Without dead ends: 79091 [2021-12-17 04:40:55,734 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 [2021-12-17 04:40:55,735 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 954 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:55,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 768 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:40:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79091 states. [2021-12-17 04:40:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79091 to 78290. [2021-12-17 04:40:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78290 states, 78289 states have (on average 1.112736144285915) internal successors, (87115), 78289 states have internal predecessors, (87115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78290 states to 78290 states and 87115 transitions. [2021-12-17 04:40:56,645 INFO L78 Accepts]: Start accepts. Automaton has 78290 states and 87115 transitions. Word has length 379 [2021-12-17 04:40:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:56,645 INFO L470 AbstractCegarLoop]: Abstraction has 78290 states and 87115 transitions. [2021-12-17 04:40:56,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78290 states and 87115 transitions. [2021-12-17 04:40:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-17 04:40:56,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:56,652 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, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:56,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:40:56,653 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash 867666540, now seen corresponding path program 1 times [2021-12-17 04:40:56,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:56,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393374619] [2021-12-17 04:40:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:56,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-12-17 04:40:56,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:56,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393374619] [2021-12-17 04:40:56,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393374619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:56,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:56,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:56,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746668186] [2021-12-17 04:40:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:56,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:56,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:56,816 INFO L87 Difference]: Start difference. First operand 78290 states and 87115 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:59,882 INFO L93 Difference]: Finished difference Result 155789 states and 173437 transitions. [2021-12-17 04:40:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 423 [2021-12-17 04:40:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:59,978 INFO L225 Difference]: With dead ends: 155789 [2021-12-17 04:40:59,979 INFO L226 Difference]: Without dead ends: 78288 [2021-12-17 04:41:00,013 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 [2021-12-17 04:41:00,015 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 1148 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:00,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 1396 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:41:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78288 states. [2021-12-17 04:41:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78288 to 77496. [2021-12-17 04:41:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77496 states, 77495 states have (on average 1.0874766113942835) internal successors, (84274), 77495 states have internal predecessors, (84274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77496 states to 77496 states and 84274 transitions. [2021-12-17 04:41:00,723 INFO L78 Accepts]: Start accepts. Automaton has 77496 states and 84274 transitions. Word has length 423 [2021-12-17 04:41:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:00,725 INFO L470 AbstractCegarLoop]: Abstraction has 77496 states and 84274 transitions. [2021-12-17 04:41:00,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 77496 states and 84274 transitions. [2021-12-17 04:41:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-17 04:41:00,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:00,732 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:41:00,732 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:00,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1745605425, now seen corresponding path program 1 times [2021-12-17 04:41:00,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:00,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133257167] [2021-12-17 04:41:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:00,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 575 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-17 04:41:00,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133257167] [2021-12-17 04:41:00,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133257167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:00,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:00,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:00,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394143618] [2021-12-17 04:41:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:00,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:00,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:00,871 INFO L87 Difference]: Start difference. First operand 77496 states and 84274 transitions. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:06,583 INFO L93 Difference]: Finished difference Result 214213 states and 233731 transitions. [2021-12-17 04:41:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 448 [2021-12-17 04:41:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:06,774 INFO L225 Difference]: With dead ends: 214213 [2021-12-17 04:41:06,774 INFO L226 Difference]: Without dead ends: 137506 [2021-12-17 04:41:06,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:06,823 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1703 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5860 mSolverCounterSat, 976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 5860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:06,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1703 Valid, 848 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 5860 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 04:41:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137506 states. [2021-12-17 04:41:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137506 to 136589. [2021-12-17 04:41:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136589 states, 136588 states have (on average 1.0831625032945793) internal successors, (147947), 136588 states have internal predecessors, (147947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136589 states to 136589 states and 147947 transitions. [2021-12-17 04:41:08,801 INFO L78 Accepts]: Start accepts. Automaton has 136589 states and 147947 transitions. Word has length 448 [2021-12-17 04:41:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:08,801 INFO L470 AbstractCegarLoop]: Abstraction has 136589 states and 147947 transitions. [2021-12-17 04:41:08,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 136589 states and 147947 transitions. [2021-12-17 04:41:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-12-17 04:41:08,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:08,813 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, 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, 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] [2021-12-17 04:41:08,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:41:08,814 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash -93408429, now seen corresponding path program 1 times [2021-12-17 04:41:08,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:08,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760556202] [2021-12-17 04:41:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:08,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 536 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-17 04:41:08,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:08,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760556202] [2021-12-17 04:41:08,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760556202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:08,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:08,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:08,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612400473] [2021-12-17 04:41:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:08,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:08,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:08,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:08,975 INFO L87 Difference]: Start difference. First operand 136589 states and 147947 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:12,589 INFO L93 Difference]: Finished difference Result 273966 states and 296693 transitions. [2021-12-17 04:41:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 514 [2021-12-17 04:41:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:12,783 INFO L225 Difference]: With dead ends: 273966 [2021-12-17 04:41:12,784 INFO L226 Difference]: Without dead ends: 138166 [2021-12-17 04:41:12,840 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 [2021-12-17 04:41:12,841 INFO L933 BasicCegarLoop]: 1345 mSDtfsCounter, 832 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:12,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1427 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:41:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138166 states. [2021-12-17 04:41:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138166 to 136581. [2021-12-17 04:41:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136581 states, 136580 states have (on average 1.0626665690437838) internal successors, (145139), 136580 states have internal predecessors, (145139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136581 states to 136581 states and 145139 transitions. [2021-12-17 04:41:14,584 INFO L78 Accepts]: Start accepts. Automaton has 136581 states and 145139 transitions. Word has length 514 [2021-12-17 04:41:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:14,585 INFO L470 AbstractCegarLoop]: Abstraction has 136581 states and 145139 transitions. [2021-12-17 04:41:14,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 136581 states and 145139 transitions. [2021-12-17 04:41:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-12-17 04:41:14,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:14,599 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:14,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:41:14,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash -312690779, now seen corresponding path program 1 times [2021-12-17 04:41:14,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:14,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389478444] [2021-12-17 04:41:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:14,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 583 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:41:14,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:14,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389478444] [2021-12-17 04:41:14,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389478444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:14,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:14,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:14,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880553741] [2021-12-17 04:41:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:14,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:14,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:14,744 INFO L87 Difference]: Start difference. First operand 136581 states and 145139 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:17,889 INFO L93 Difference]: Finished difference Result 258221 states and 274856 transitions. [2021-12-17 04:41:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:17,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 545 [2021-12-17 04:41:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:18,071 INFO L225 Difference]: With dead ends: 258221 [2021-12-17 04:41:18,072 INFO L226 Difference]: Without dead ends: 136596 [2021-12-17 04:41:18,125 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 [2021-12-17 04:41:18,126 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 708 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:18,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 1831 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:41:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136596 states. [2021-12-17 04:41:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136596 to 135003. [2021-12-17 04:41:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135003 states, 135002 states have (on average 1.0594880075850728) internal successors, (143033), 135002 states have internal predecessors, (143033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135003 states to 135003 states and 143033 transitions. [2021-12-17 04:41:19,902 INFO L78 Accepts]: Start accepts. Automaton has 135003 states and 143033 transitions. Word has length 545 [2021-12-17 04:41:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:19,902 INFO L470 AbstractCegarLoop]: Abstraction has 135003 states and 143033 transitions. [2021-12-17 04:41:19,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 135003 states and 143033 transitions. [2021-12-17 04:41:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-12-17 04:41:19,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:19,916 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 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] [2021-12-17 04:41:19,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:41:19,916 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1127182790, now seen corresponding path program 1 times [2021-12-17 04:41:19,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470137838] [2021-12-17 04:41:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:19,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-12-17 04:41:20,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470137838] [2021-12-17 04:41:20,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470137838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:20,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:20,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:20,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056411555] [2021-12-17 04:41:20,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:20,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:20,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:20,072 INFO L87 Difference]: Start difference. First operand 135003 states and 143033 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:23,061 INFO L93 Difference]: Finished difference Result 264471 states and 280863 transitions. [2021-12-17 04:41:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 578 [2021-12-17 04:41:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:23,226 INFO L225 Difference]: With dead ends: 264471 [2021-12-17 04:41:23,226 INFO L226 Difference]: Without dead ends: 146003 [2021-12-17 04:41:23,293 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 [2021-12-17 04:41:23,293 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1193 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:23,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 370 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:41:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146003 states. [2021-12-17 04:41:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146003 to 146003. [2021-12-17 04:41:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146003 states, 146002 states have (on average 1.0549513020369583) internal successors, (154025), 146002 states have internal predecessors, (154025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146003 states to 146003 states and 154025 transitions. [2021-12-17 04:41:25,202 INFO L78 Accepts]: Start accepts. Automaton has 146003 states and 154025 transitions. Word has length 578 [2021-12-17 04:41:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:25,203 INFO L470 AbstractCegarLoop]: Abstraction has 146003 states and 154025 transitions. [2021-12-17 04:41:25,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 146003 states and 154025 transitions. [2021-12-17 04:41:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-12-17 04:41:25,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:25,221 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:25,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:41:25,221 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash -98353201, now seen corresponding path program 1 times [2021-12-17 04:41:25,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:25,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447552523] [2021-12-17 04:41:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:25,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 819 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-17 04:41:25,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:25,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447552523] [2021-12-17 04:41:25,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447552523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:25,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:25,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:25,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40185781] [2021-12-17 04:41:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:25,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:25,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:25,361 INFO L87 Difference]: Start difference. First operand 146003 states and 154025 transitions. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:29,199 INFO L93 Difference]: Finished difference Result 318760 states and 337327 transitions. [2021-12-17 04:41:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 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 611 [2021-12-17 04:41:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:29,421 INFO L225 Difference]: With dead ends: 318760 [2021-12-17 04:41:29,421 INFO L226 Difference]: Without dead ends: 173546 [2021-12-17 04:41:29,488 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 [2021-12-17 04:41:29,490 INFO L933 BasicCegarLoop]: 1655 mSDtfsCounter, 770 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:29,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 1786 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:41:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173546 states. [2021-12-17 04:41:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173546 to 172744. [2021-12-17 04:41:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172744 states, 172743 states have (on average 1.0489976438987398) internal successors, (181207), 172743 states have internal predecessors, (181207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172744 states to 172744 states and 181207 transitions. [2021-12-17 04:41:31,586 INFO L78 Accepts]: Start accepts. Automaton has 172744 states and 181207 transitions. Word has length 611 [2021-12-17 04:41:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:31,586 INFO L470 AbstractCegarLoop]: Abstraction has 172744 states and 181207 transitions. [2021-12-17 04:41:31,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 172744 states and 181207 transitions. [2021-12-17 04:41:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2021-12-17 04:41:31,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:31,602 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-17 04:41:31,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:41:31,602 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash 76918194, now seen corresponding path program 1 times [2021-12-17 04:41:31,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:31,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927148376] [2021-12-17 04:41:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:31,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 863 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-17 04:41:31,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927148376] [2021-12-17 04:41:31,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927148376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:31,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:31,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:31,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270413522] [2021-12-17 04:41:31,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:31,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:31,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:31,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:31,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:31,745 INFO L87 Difference]: Start difference. First operand 172744 states and 181207 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:34,865 INFO L93 Difference]: Finished difference Result 348640 states and 365865 transitions. [2021-12-17 04:41:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 622 [2021-12-17 04:41:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:35,092 INFO L225 Difference]: With dead ends: 348640 [2021-12-17 04:41:35,092 INFO L226 Difference]: Without dead ends: 176685 [2021-12-17 04:41:35,184 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 [2021-12-17 04:41:35,184 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 722 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:35,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1781 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:41:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176685 states. [2021-12-17 04:41:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176685 to 176679. [2021-12-17 04:41:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176679 states, 176678 states have (on average 1.0469667983563318) internal successors, (184976), 176678 states have internal predecessors, (184976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176679 states to 176679 states and 184976 transitions. [2021-12-17 04:41:37,394 INFO L78 Accepts]: Start accepts. Automaton has 176679 states and 184976 transitions. Word has length 622 [2021-12-17 04:41:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:37,395 INFO L470 AbstractCegarLoop]: Abstraction has 176679 states and 184976 transitions. [2021-12-17 04:41:37,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 176679 states and 184976 transitions. [2021-12-17 04:41:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-12-17 04:41:37,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:37,408 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:37,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:41:37,409 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2045412406, now seen corresponding path program 1 times [2021-12-17 04:41:37,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792915559] [2021-12-17 04:41:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:37,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 689 proven. 125 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-17 04:41:38,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792915559] [2021-12-17 04:41:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792915559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:41:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558560900] [2021-12-17 04:41:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:38,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:41:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:41:38,147 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) [2021-12-17 04:41:38,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:41:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:41:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:41:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 1158 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-17 04:41:39,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:41:39,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558560900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:39,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:41:39,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-17 04:41:39,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705708661] [2021-12-17 04:41:39,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:39,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:41:39,855 INFO L87 Difference]: Start difference. First operand 176679 states and 184976 transitions. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)