./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label54.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_label54.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 49ff6ba228d081d26cec6b087caf15954318cb178107abc089cabcbe5599946d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:42:02,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:42:02,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:42:02,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:42:02,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:42:02,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:42:02,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:42:02,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:42:02,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:42:02,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:42:02,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:42:02,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:42:02,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:42:02,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:42:02,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:42:02,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:42:02,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:42:02,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:42:02,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:42:02,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:42:02,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:42:02,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:42:02,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:42:02,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:42:02,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:42:02,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:42:02,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:42:02,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:42:02,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:42:02,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:42:02,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:42:02,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:42:02,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:42:02,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:42:02,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:42:02,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:42:02,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:42:02,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:42:02,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:42:02,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:42:02,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:42:02,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:42:02,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:42:02,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:42:02,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:42:02,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:42:02,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:42:02,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:42:02,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:42:02,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:42:02,354 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:42:02,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:42:02,355 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:42:02,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:42:02,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:42:02,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:42:02,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:42:02,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:42:02,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:42:02,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:42:02,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:42:02,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:42:02,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:42:02,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:42:02,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:42:02,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:42:02,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:02,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:42:02,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:42:02,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:42:02,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:42:02,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:42:02,358 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:42:02,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:42:02,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:42:02,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:42:02,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49ff6ba228d081d26cec6b087caf15954318cb178107abc089cabcbe5599946d [2021-12-17 04:42:02,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:42:02,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:42:02,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:42:02,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:42:02,577 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:42:02,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2021-12-17 04:42:02,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ed4e1550/78e2e6fa0ecf49159a779d9da8174faa/FLAGb831a6418 [2021-12-17 04:42:03,228 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:42:03,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2021-12-17 04:42:03,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ed4e1550/78e2e6fa0ecf49159a779d9da8174faa/FLAGb831a6418 [2021-12-17 04:42:03,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ed4e1550/78e2e6fa0ecf49159a779d9da8174faa [2021-12-17 04:42:03,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:42:03,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:42:03,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:03,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:42:03,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:42:03,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:03" (1/1) ... [2021-12-17 04:42:03,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d6ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:03, skipping insertion in model container [2021-12-17 04:42:03,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:03" (1/1) ... [2021-12-17 04:42:03,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:42:03,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:42:03,849 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_label54.c[4044,4057] [2021-12-17 04:42:04,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:04,437 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:42:04,454 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_label54.c[4044,4057] [2021-12-17 04:42:04,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:04,775 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:42:04,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04 WrapperNode [2021-12-17 04:42:04,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:04,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:04,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:42:04,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:42:04,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:04,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,227 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:42:05,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:05,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:42:05,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:42:05,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:42:05,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:42:05,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:42:05,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:42:05,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:42:05,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (1/1) ... [2021-12-17 04:42:05,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:05,752 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 04:42:05,772 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 04:42:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:42:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:42:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:42:05,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:42:05,857 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:42:05,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:42:09,360 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:42:09,373 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:42:09,373 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:42:09,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:09 BoogieIcfgContainer [2021-12-17 04:42:09,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:42:09,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:42:09,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:42:09,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:42:09,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:42:03" (1/3) ... [2021-12-17 04:42:09,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa923b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:09, skipping insertion in model container [2021-12-17 04:42:09,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:04" (2/3) ... [2021-12-17 04:42:09,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa923b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:09, skipping insertion in model container [2021-12-17 04:42:09,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:09" (3/3) ... [2021-12-17 04:42:09,381 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2021-12-17 04:42:09,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:42:09,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:42:09,416 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:42:09,421 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 04:42:09,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:42:09,485 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 04:42:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 04:42:09,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:09,490 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] [2021-12-17 04:42:09,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2021-12-17 04:42:09,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:09,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940993126] [2021-12-17 04:42:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:09,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:09,654 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 04:42:09,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940993126] [2021-12-17 04:42:09,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940993126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:09,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:09,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:09,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404748216] [2021-12-17 04:42:09,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:09,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:09,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:09,680 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 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 04:42:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:12,932 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-17 04:42:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-17 04:42:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:12,954 INFO L225 Difference]: With dead ends: 3035 [2021-12-17 04:42:12,954 INFO L226 Difference]: Without dead ends: 1873 [2021-12-17 04:42:12,963 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 04:42:12,969 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 878 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:12,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:42:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-17 04:42:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-17 04:42:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 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 04:42:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-17 04:42:13,065 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 27 [2021-12-17 04:42:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:13,065 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-17 04:42:13,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 04:42:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-17 04:42:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 04:42:13,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:13,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:42:13,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1328079915, now seen corresponding path program 1 times [2021-12-17 04:42:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726908740] [2021-12-17 04:42:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:13,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:13,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726908740] [2021-12-17 04:42:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726908740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:13,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:13,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:13,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854142457] [2021-12-17 04:42:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:13,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:13,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:13,189 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 04:42:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:16,685 INFO L93 Difference]: Finished difference Result 5405 states and 8404 transitions. [2021-12-17 04:42:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:16,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-17 04:42:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:16,702 INFO L225 Difference]: With dead ends: 5405 [2021-12-17 04:42:16,703 INFO L226 Difference]: Without dead ends: 3548 [2021-12-17 04:42:16,705 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 04:42:16,706 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 862 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:16,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1040 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 04:42:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-12-17 04:42:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3476. [2021-12-17 04:42:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 1.4897841726618706) internal successors, (5177), 3475 states have internal predecessors, (5177), 0 states have call successors, (0), 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 04:42:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 5177 transitions. [2021-12-17 04:42:16,754 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 5177 transitions. Word has length 99 [2021-12-17 04:42:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:16,755 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 5177 transitions. [2021-12-17 04:42:16,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 04:42:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 5177 transitions. [2021-12-17 04:42:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 04:42:16,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:16,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:42:16,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash -36066970, now seen corresponding path program 1 times [2021-12-17 04:42:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:16,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858418734] [2021-12-17 04:42:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:16,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:16,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:16,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858418734] [2021-12-17 04:42:16,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858418734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:16,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:16,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:16,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584080609] [2021-12-17 04:42:16,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:16,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:16,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:16,848 INFO L87 Difference]: Start difference. First operand 3476 states and 5177 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 04:42:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:19,749 INFO L93 Difference]: Finished difference Result 10142 states and 15129 transitions. [2021-12-17 04:42:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:19,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-17 04:42:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:19,768 INFO L225 Difference]: With dead ends: 10142 [2021-12-17 04:42:19,768 INFO L226 Difference]: Without dead ends: 6668 [2021-12-17 04:42:19,773 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 04:42:19,774 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 962 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:19,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 850 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:42:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6668 states. [2021-12-17 04:42:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6668 to 6659. [2021-12-17 04:42:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 1.364373685791529) internal successors, (9084), 6658 states have internal predecessors, (9084), 0 states have call successors, (0), 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 04:42:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 9084 transitions. [2021-12-17 04:42:19,861 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 9084 transitions. Word has length 113 [2021-12-17 04:42:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:19,861 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 9084 transitions. [2021-12-17 04:42:19,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 04:42:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 9084 transitions. [2021-12-17 04:42:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 04:42:19,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:19,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:19,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:42:19,869 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:19,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1462501558, now seen corresponding path program 1 times [2021-12-17 04:42:19,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:19,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277848044] [2021-12-17 04:42:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:19,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:19,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:19,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277848044] [2021-12-17 04:42:19,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277848044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:19,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:19,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:19,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582555027] [2021-12-17 04:42:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:19,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:19,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:19,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:19,948 INFO L87 Difference]: Start difference. First operand 6659 states and 9084 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:22,855 INFO L93 Difference]: Finished difference Result 16505 states and 23199 transitions. [2021-12-17 04:42:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-17 04:42:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:22,880 INFO L225 Difference]: With dead ends: 16505 [2021-12-17 04:42:22,881 INFO L226 Difference]: Without dead ends: 9848 [2021-12-17 04:42:22,887 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 04:42:22,888 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 997 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:22,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 907 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:42:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-12-17 04:42:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9836. [2021-12-17 04:42:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9836 states, 9835 states have (on average 1.3705134722928318) internal successors, (13479), 9835 states have internal predecessors, (13479), 0 states have call successors, (0), 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 04:42:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9836 states to 9836 states and 13479 transitions. [2021-12-17 04:42:23,032 INFO L78 Accepts]: Start accepts. Automaton has 9836 states and 13479 transitions. Word has length 116 [2021-12-17 04:42:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:23,033 INFO L470 AbstractCegarLoop]: Abstraction has 9836 states and 13479 transitions. [2021-12-17 04:42:23,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 9836 states and 13479 transitions. [2021-12-17 04:42:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-17 04:42:23,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:23,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:23,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:42:23,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1411141186, now seen corresponding path program 1 times [2021-12-17 04:42:23,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:23,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980645276] [2021-12-17 04:42:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:23,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:23,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:23,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980645276] [2021-12-17 04:42:23,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980645276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:23,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:23,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:42:23,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055131956] [2021-12-17 04:42:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:23,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 04:42:23,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 04:42:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:42:23,247 INFO L87 Difference]: Start difference. First operand 9836 states and 13479 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 04:42:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:26,752 INFO L93 Difference]: Finished difference Result 20498 states and 27849 transitions. [2021-12-17 04:42:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:42:26,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-12-17 04:42:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:26,774 INFO L225 Difference]: With dead ends: 20498 [2021-12-17 04:42:26,774 INFO L226 Difference]: Without dead ends: 10664 [2021-12-17 04:42:26,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:26,784 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 2251 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:26,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 2643 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 4600 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 04:42:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10664 states. [2021-12-17 04:42:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10664 to 10623. [2021-12-17 04:42:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10622 states have (on average 1.3435322914705328) internal successors, (14271), 10622 states have internal predecessors, (14271), 0 states have call successors, (0), 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 04:42:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 14271 transitions. [2021-12-17 04:42:26,947 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 14271 transitions. Word has length 132 [2021-12-17 04:42:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:26,948 INFO L470 AbstractCegarLoop]: Abstraction has 10623 states and 14271 transitions. [2021-12-17 04:42:26,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 04:42:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 14271 transitions. [2021-12-17 04:42:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-17 04:42:26,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:26,953 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:42:26,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:42:26,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash -869470445, now seen corresponding path program 1 times [2021-12-17 04:42:26,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:26,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950649520] [2021-12-17 04:42:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:26,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 04:42:27,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:27,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950649520] [2021-12-17 04:42:27,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950649520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:27,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:27,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:27,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61131170] [2021-12-17 04:42:27,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:27,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:27,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:27,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:27,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:27,046 INFO L87 Difference]: Start difference. First operand 10623 states and 14271 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 04:42:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:29,721 INFO L93 Difference]: Finished difference Result 29899 states and 40703 transitions. [2021-12-17 04:42:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 195 [2021-12-17 04:42:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:29,750 INFO L225 Difference]: With dead ends: 29899 [2021-12-17 04:42:29,751 INFO L226 Difference]: Without dead ends: 20065 [2021-12-17 04:42:29,762 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 04:42:29,763 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 887 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:29,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 998 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:42:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-12-17 04:42:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 19274. [2021-12-17 04:42:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19274 states, 19273 states have (on average 1.2405956519483214) internal successors, (23910), 19273 states have internal predecessors, (23910), 0 states have call successors, (0), 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 04:42:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19274 states to 19274 states and 23910 transitions. [2021-12-17 04:42:29,953 INFO L78 Accepts]: Start accepts. Automaton has 19274 states and 23910 transitions. Word has length 195 [2021-12-17 04:42:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:29,953 INFO L470 AbstractCegarLoop]: Abstraction has 19274 states and 23910 transitions. [2021-12-17 04:42:29,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 04:42:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 19274 states and 23910 transitions. [2021-12-17 04:42:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-17 04:42:29,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:29,956 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:29,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:42:29,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:29,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1420967643, now seen corresponding path program 1 times [2021-12-17 04:42:29,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219714301] [2021-12-17 04:42:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:29,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:30,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219714301] [2021-12-17 04:42:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219714301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:30,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:30,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:30,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173442998] [2021-12-17 04:42:30,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:30,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:30,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:30,028 INFO L87 Difference]: Start difference. First operand 19274 states and 23910 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:32,746 INFO L93 Difference]: Finished difference Result 44068 states and 54897 transitions. [2021-12-17 04:42:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-12-17 04:42:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:32,786 INFO L225 Difference]: With dead ends: 44068 [2021-12-17 04:42:32,786 INFO L226 Difference]: Without dead ends: 25583 [2021-12-17 04:42:32,801 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 04:42:32,804 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 858 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:32,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 956 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:42:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25583 states. [2021-12-17 04:42:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25583 to 24786. [2021-12-17 04:42:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 24785 states have (on average 1.230260238047206) internal successors, (30492), 24785 states have internal predecessors, (30492), 0 states have call successors, (0), 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 04:42:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 30492 transitions. [2021-12-17 04:42:33,051 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 30492 transitions. Word has length 226 [2021-12-17 04:42:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:33,051 INFO L470 AbstractCegarLoop]: Abstraction has 24786 states and 30492 transitions. [2021-12-17 04:42:33,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 30492 transitions. [2021-12-17 04:42:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-17 04:42:33,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:33,055 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:33,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:42:33,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1839244227, now seen corresponding path program 1 times [2021-12-17 04:42:33,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:33,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733289337] [2021-12-17 04:42:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:33,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:33,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:33,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733289337] [2021-12-17 04:42:33,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733289337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:33,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:33,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:33,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315576899] [2021-12-17 04:42:33,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:33,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:33,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:33,186 INFO L87 Difference]: Start difference. First operand 24786 states and 30492 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 04:42:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:36,926 INFO L93 Difference]: Finished difference Result 49588 states and 61023 transitions. [2021-12-17 04:42:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2021-12-17 04:42:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:36,953 INFO L225 Difference]: With dead ends: 49588 [2021-12-17 04:42:36,953 INFO L226 Difference]: Without dead ends: 25591 [2021-12-17 04:42:36,966 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 04:42:36,967 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1450 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 4873 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 4873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:36,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 1036 Invalid, 5409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 4873 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:42:36,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25591 states. [2021-12-17 04:42:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25591 to 25573. [2021-12-17 04:42:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25573 states, 25572 states have (on average 1.2108165180666355) internal successors, (30963), 25572 states have internal predecessors, (30963), 0 states have call successors, (0), 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 04:42:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25573 states to 25573 states and 30963 transitions. [2021-12-17 04:42:37,193 INFO L78 Accepts]: Start accepts. Automaton has 25573 states and 30963 transitions. Word has length 289 [2021-12-17 04:42:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:37,193 INFO L470 AbstractCegarLoop]: Abstraction has 25573 states and 30963 transitions. [2021-12-17 04:42:37,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 04:42:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 25573 states and 30963 transitions. [2021-12-17 04:42:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-17 04:42:37,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:37,197 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:37,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:42:37,199 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:37,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash 113626786, now seen corresponding path program 1 times [2021-12-17 04:42:37,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:37,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38318646] [2021-12-17 04:42:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:37,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:37,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38318646] [2021-12-17 04:42:37,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38318646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:37,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:37,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:37,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267809368] [2021-12-17 04:42:37,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:37,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:37,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:37,279 INFO L87 Difference]: Start difference. First operand 25573 states and 30963 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 04:42:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:40,255 INFO L93 Difference]: Finished difference Result 56658 states and 69683 transitions. [2021-12-17 04:42:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 315 [2021-12-17 04:42:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:40,295 INFO L225 Difference]: With dead ends: 56658 [2021-12-17 04:42:40,295 INFO L226 Difference]: Without dead ends: 31874 [2021-12-17 04:42:40,306 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 04:42:40,308 INFO L933 BasicCegarLoop]: 1770 mSDtfsCounter, 849 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:40,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1923 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:42:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31874 states. [2021-12-17 04:42:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31874 to 31868. [2021-12-17 04:42:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31868 states, 31867 states have (on average 1.1872783757492076) internal successors, (37835), 31867 states have internal predecessors, (37835), 0 states have call successors, (0), 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 04:42:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31868 states to 31868 states and 37835 transitions. [2021-12-17 04:42:40,637 INFO L78 Accepts]: Start accepts. Automaton has 31868 states and 37835 transitions. Word has length 315 [2021-12-17 04:42:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:40,637 INFO L470 AbstractCegarLoop]: Abstraction has 31868 states and 37835 transitions. [2021-12-17 04:42:40,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 04:42:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31868 states and 37835 transitions. [2021-12-17 04:42:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-12-17 04:42:40,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:40,643 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:40,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:42:40,643 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1262569867, now seen corresponding path program 1 times [2021-12-17 04:42:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:40,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364999690] [2021-12-17 04:42:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:40,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:40,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364999690] [2021-12-17 04:42:40,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364999690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:40,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313149862] [2021-12-17 04:42:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:40,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:40,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:40,759 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 04:42:40,782 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 04:42:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:40,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:42:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-12-17 04:42:41,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:41,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313149862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:41,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:41,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 04:42:41,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310907075] [2021-12-17 04:42:41,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:41,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:41,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:42:41,483 INFO L87 Difference]: Start difference. First operand 31868 states and 37835 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 04:42:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:44,492 INFO L93 Difference]: Finished difference Result 93796 states and 111636 transitions. [2021-12-17 04:42:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 343 [2021-12-17 04:42:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:44,562 INFO L225 Difference]: With dead ends: 93796 [2021-12-17 04:42:44,562 INFO L226 Difference]: Without dead ends: 62717 [2021-12-17 04:42:44,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:42:44,594 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 1009 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:44,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 1090 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2690 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:42:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62717 states. [2021-12-17 04:42:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62717 to 62699. [2021-12-17 04:42:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62699 states, 62698 states have (on average 1.1504992184758684) internal successors, (72134), 62698 states have internal predecessors, (72134), 0 states have call successors, (0), 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 04:42:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62699 states to 62699 states and 72134 transitions. [2021-12-17 04:42:45,264 INFO L78 Accepts]: Start accepts. Automaton has 62699 states and 72134 transitions. Word has length 343 [2021-12-17 04:42:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:45,264 INFO L470 AbstractCegarLoop]: Abstraction has 62699 states and 72134 transitions. [2021-12-17 04:42:45,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 04:42:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62699 states and 72134 transitions. [2021-12-17 04:42:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-17 04:42:45,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:45,275 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:45,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:42:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 04:42:45,491 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash -152484837, now seen corresponding path program 1 times [2021-12-17 04:42:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557678003] [2021-12-17 04:42:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 221 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 04:42:45,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:45,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557678003] [2021-12-17 04:42:45,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557678003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208013308] [2021-12-17 04:42:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:45,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:45,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:42:45,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:42:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:42:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-17 04:42:46,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:46,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208013308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:46,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:46,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:42:46,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963701072] [2021-12-17 04:42:46,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:46,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:46,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:46,148 INFO L87 Difference]: Start difference. First operand 62699 states and 72134 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 04:42:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:48,914 INFO L93 Difference]: Finished difference Result 124606 states and 143472 transitions. [2021-12-17 04:42:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:48,914 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 353 [2021-12-17 04:42:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:48,987 INFO L225 Difference]: With dead ends: 124606 [2021-12-17 04:42:48,987 INFO L226 Difference]: Without dead ends: 62696 [2021-12-17 04:42:49,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:49,016 INFO L933 BasicCegarLoop]: 1371 mSDtfsCounter, 1127 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:49,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1453 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:42:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62696 states. [2021-12-17 04:42:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62696 to 62694. [2021-12-17 04:42:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62694 states, 62693 states have (on average 1.1165839886430702) internal successors, (70002), 62693 states have internal predecessors, (70002), 0 states have call successors, (0), 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 04:42:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62694 states to 62694 states and 70002 transitions. [2021-12-17 04:42:49,815 INFO L78 Accepts]: Start accepts. Automaton has 62694 states and 70002 transitions. Word has length 353 [2021-12-17 04:42:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:49,815 INFO L470 AbstractCegarLoop]: Abstraction has 62694 states and 70002 transitions. [2021-12-17 04:42:49,816 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 04:42:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62694 states and 70002 transitions. [2021-12-17 04:42:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-12-17 04:42:49,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:49,824 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:49,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:42:50,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 04:42:50,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -475281658, now seen corresponding path program 1 times [2021-12-17 04:42:50,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175579547] [2021-12-17 04:42:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:50,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:50,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175579547] [2021-12-17 04:42:50,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175579547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:50,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:50,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:50,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044819423] [2021-12-17 04:42:50,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:50,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:50,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:50,280 INFO L87 Difference]: Start difference. First operand 62694 states and 70002 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 04:42:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:55,776 INFO L93 Difference]: Finished difference Result 194737 states and 219412 transitions. [2021-12-17 04:42:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 420 [2021-12-17 04:42:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:55,966 INFO L225 Difference]: With dead ends: 194737 [2021-12-17 04:42:55,966 INFO L226 Difference]: Without dead ends: 132832 [2021-12-17 04:42:55,999 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 04:42:56,000 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1533 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 6180 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 6911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 6180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:56,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 937 Invalid, 6911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 6180 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 04:42:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132832 states. [2021-12-17 04:42:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132832 to 132809. [2021-12-17 04:42:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132809 states, 132808 states have (on average 1.1046397807361001) internal successors, (146705), 132808 states have internal predecessors, (146705), 0 states have call successors, (0), 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 04:42:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132809 states to 132809 states and 146705 transitions. [2021-12-17 04:42:57,637 INFO L78 Accepts]: Start accepts. Automaton has 132809 states and 146705 transitions. Word has length 420 [2021-12-17 04:42:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:57,638 INFO L470 AbstractCegarLoop]: Abstraction has 132809 states and 146705 transitions. [2021-12-17 04:42:57,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 04:42:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 132809 states and 146705 transitions. [2021-12-17 04:42:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-17 04:42:57,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:57,647 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 04:42:57,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:42:57,647 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 66240533, now seen corresponding path program 1 times [2021-12-17 04:42:57,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:57,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084845362] [2021-12-17 04:42:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:57,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:57,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084845362] [2021-12-17 04:42:57,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084845362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:57,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:57,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:57,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271997830] [2021-12-17 04:42:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:57,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:57,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:57,747 INFO L87 Difference]: Start difference. First operand 132809 states and 146705 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 04:43:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:01,223 INFO L93 Difference]: Finished difference Result 264848 states and 292653 transitions. [2021-12-17 04:43:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 421 [2021-12-17 04:43:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:01,401 INFO L225 Difference]: With dead ends: 264848 [2021-12-17 04:43:01,401 INFO L226 Difference]: Without dead ends: 132828 [2021-12-17 04:43:01,441 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 04:43:01,442 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 799 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:01,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 1917 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:43:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132828 states. [2021-12-17 04:43:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132828 to 132797. [2021-12-17 04:43:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132797 states, 132796 states have (on average 1.0754616102894665) internal successors, (142817), 132796 states have internal predecessors, (142817), 0 states have call successors, (0), 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 04:43:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132797 states to 132797 states and 142817 transitions. [2021-12-17 04:43:03,040 INFO L78 Accepts]: Start accepts. Automaton has 132797 states and 142817 transitions. Word has length 421 [2021-12-17 04:43:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:03,041 INFO L470 AbstractCegarLoop]: Abstraction has 132797 states and 142817 transitions. [2021-12-17 04:43:03,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 04:43:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 132797 states and 142817 transitions. [2021-12-17 04:43:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-17 04:43:03,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:03,049 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:43:03,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:43:03,049 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -582552875, now seen corresponding path program 1 times [2021-12-17 04:43:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786102611] [2021-12-17 04:43:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:03,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 04:43:03,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786102611] [2021-12-17 04:43:03,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786102611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:03,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:03,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:03,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853255404] [2021-12-17 04:43:03,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:03,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:43:03,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:43:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:03,286 INFO L87 Difference]: Start difference. First operand 132797 states and 142817 transitions. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 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 04:43:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:10,030 INFO L93 Difference]: Finished difference Result 368213 states and 397268 transitions. [2021-12-17 04:43:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:43:10,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 426 [2021-12-17 04:43:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:10,364 INFO L225 Difference]: With dead ends: 368213 [2021-12-17 04:43:10,364 INFO L226 Difference]: Without dead ends: 236205 [2021-12-17 04:43:10,442 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 04:43:10,444 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1722 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 6720 mSolverCounterSat, 1113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1722 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 7833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1113 IncrementalHoareTripleChecker+Valid, 6720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:10,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1722 Valid, 754 Invalid, 7833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1113 Valid, 6720 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 04:43:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236205 states. [2021-12-17 04:43:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236205 to 230490. [2021-12-17 04:43:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230490 states, 230489 states have (on average 1.0747454325369106) internal successors, (247717), 230489 states have internal predecessors, (247717), 0 states have call successors, (0), 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 04:43:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230490 states to 230490 states and 247717 transitions. [2021-12-17 04:43:13,315 INFO L78 Accepts]: Start accepts. Automaton has 230490 states and 247717 transitions. Word has length 426 [2021-12-17 04:43:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 230490 states and 247717 transitions. [2021-12-17 04:43:13,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 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 04:43:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 230490 states and 247717 transitions. [2021-12-17 04:43:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-12-17 04:43:13,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:13,325 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:13,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:43:13,325 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1419491106, now seen corresponding path program 1 times [2021-12-17 04:43:13,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749081261] [2021-12-17 04:43:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:13,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 290 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 04:43:13,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749081261] [2021-12-17 04:43:13,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749081261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:43:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199962175] [2021-12-17 04:43:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:13,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:43:13,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:43:13,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:43:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:13,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:43:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:43:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:43:14,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:43:14,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199962175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:14,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:43:14,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:43:14,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772372354] [2021-12-17 04:43:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:14,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:14,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:43:14,349 INFO L87 Difference]: Start difference. First operand 230490 states and 247717 transitions. Second operand has 3 states, 3 states have (on average 115.0) 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 04:43:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:18,085 INFO L93 Difference]: Finished difference Result 448344 states and 484541 transitions. [2021-12-17 04:43:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) 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 457 [2021-12-17 04:43:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:18,435 INFO L225 Difference]: With dead ends: 448344 [2021-12-17 04:43:18,436 INFO L226 Difference]: Without dead ends: 243841 [2021-12-17 04:43:18,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:43:18,535 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 1139 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:18,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1139 Valid, 397 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:43:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243841 states. [2021-12-17 04:43:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243841 to 243840. [2021-12-17 04:43:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243840 states, 243839 states have (on average 1.0747993553123167) internal successors, (262078), 243839 states have internal predecessors, (262078), 0 states have call successors, (0), 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 04:43:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243840 states to 243840 states and 262078 transitions. [2021-12-17 04:43:21,465 INFO L78 Accepts]: Start accepts. Automaton has 243840 states and 262078 transitions. Word has length 457 [2021-12-17 04:43:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:21,465 INFO L470 AbstractCegarLoop]: Abstraction has 243840 states and 262078 transitions. [2021-12-17 04:43:21,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) 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 04:43:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 243840 states and 262078 transitions. [2021-12-17 04:43:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-12-17 04:43:21,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:21,476 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:43:21,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:43:21,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:21,678 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:21,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1360473951, now seen corresponding path program 1 times [2021-12-17 04:43:21,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:21,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82791595] [2021-12-17 04:43:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:21,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 04:43:21,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:21,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82791595] [2021-12-17 04:43:21,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82791595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:21,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:21,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:21,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733665851] [2021-12-17 04:43:21,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:21,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:43:21,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:43:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:21,871 INFO L87 Difference]: Start difference. First operand 243840 states and 262078 transitions. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 04:43:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:26,812 INFO L93 Difference]: Finished difference Result 526242 states and 565925 transitions. [2021-12-17 04:43:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:43:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 492 [2021-12-17 04:43:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:27,453 INFO L225 Difference]: With dead ends: 526242 [2021-12-17 04:43:27,454 INFO L226 Difference]: Without dead ends: 273743 [2021-12-17 04:43:27,500 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 04:43:27,500 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 1357 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4567 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 5040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 4567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:27,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 1088 Invalid, 5040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 4567 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:43:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273743 states. [2021-12-17 04:43:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273743 to 260361. [2021-12-17 04:43:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260361 states, 260360 states have (on average 1.0649446919649717) internal successors, (277269), 260360 states have internal predecessors, (277269), 0 states have call successors, (0), 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 04:43:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260361 states to 260361 states and 277269 transitions. [2021-12-17 04:43:30,573 INFO L78 Accepts]: Start accepts. Automaton has 260361 states and 277269 transitions. Word has length 492 [2021-12-17 04:43:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:30,573 INFO L470 AbstractCegarLoop]: Abstraction has 260361 states and 277269 transitions. [2021-12-17 04:43:30,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 04:43:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 260361 states and 277269 transitions. [2021-12-17 04:43:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-12-17 04:43:30,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:30,582 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-17 04:43:30,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:43:30,582 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1426219641, now seen corresponding path program 1 times [2021-12-17 04:43:30,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:30,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479512711] [2021-12-17 04:43:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:30,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2021-12-17 04:43:30,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:30,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479512711] [2021-12-17 04:43:30,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479512711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:30,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:30,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:43:30,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119102288] [2021-12-17 04:43:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:30,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:30,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:30,691 INFO L87 Difference]: Start difference. First operand 260361 states and 277269 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 04:43:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:33,709 INFO L93 Difference]: Finished difference Result 495500 states and 528661 transitions. [2021-12-17 04:43:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:33,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 512 [2021-12-17 04:43:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:34,029 INFO L225 Difference]: With dead ends: 495500 [2021-12-17 04:43:34,030 INFO L226 Difference]: Without dead ends: 259552 [2021-12-17 04:43:34,094 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 04:43:34,095 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 1570 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:34,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 297 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 04:43:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259552 states. [2021-12-17 04:43:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259552 to 259550. [2021-12-17 04:43:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259550 states, 259549 states have (on average 1.0646005185918652) internal successors, (276316), 259549 states have internal predecessors, (276316), 0 states have call successors, (0), 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 04:43:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259550 states to 259550 states and 276316 transitions. [2021-12-17 04:43:37,348 INFO L78 Accepts]: Start accepts. Automaton has 259550 states and 276316 transitions. Word has length 512 [2021-12-17 04:43:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:37,348 INFO L470 AbstractCegarLoop]: Abstraction has 259550 states and 276316 transitions. [2021-12-17 04:43:37,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 04:43:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 259550 states and 276316 transitions. [2021-12-17 04:43:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-12-17 04:43:37,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:37,358 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:37,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:43:37,358 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1193820110, now seen corresponding path program 1 times [2021-12-17 04:43:37,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306963642] [2021-12-17 04:43:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:37,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:43:37,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306963642] [2021-12-17 04:43:37,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306963642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:37,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:37,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:37,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145369041] [2021-12-17 04:43:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:37,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:37,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:37,490 INFO L87 Difference]: Start difference. First operand 259550 states and 276316 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 04:43:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:41,408 INFO L93 Difference]: Finished difference Result 496268 states and 529354 transitions. [2021-12-17 04:43:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 526 [2021-12-17 04:43:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted.