./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label46.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_label46.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 829096e7f479f5346a6eede2bd426bfcc729b36401312306aa48ba670b26d42a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:41:06,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:41:06,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:41:06,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:41:06,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:41:06,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:41:06,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:41:06,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:41:06,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:41:06,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:41:06,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:41:06,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:41:06,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:41:06,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:41:06,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:41:06,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:41:06,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:41:06,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:41:06,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:41:06,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:41:06,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:41:06,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:41:06,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:41:06,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:41:06,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:41:06,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:41:06,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:41:06,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:41:06,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:41:06,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:41:06,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:41:06,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:41:06,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:41:06,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:41:06,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:41:06,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:41:06,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:41:06,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:41:06,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:41:06,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:41:06,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:41:06,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:41:06,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:41:06,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:41:06,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:41:06,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:41:06,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:41:06,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:41:06,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:41:06,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:41:06,209 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:41:06,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:41:06,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:41:06,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:41:06,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:41:06,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:41:06,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:41:06,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:41:06,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:41:06,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:41:06,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:41:06,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:41:06,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:41:06,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:41:06,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:41:06,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:41:06,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:41:06,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:41:06,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:41:06,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:41:06,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:41:06,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:41:06,214 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:41:06,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:41:06,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:41:06,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:41:06,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 829096e7f479f5346a6eede2bd426bfcc729b36401312306aa48ba670b26d42a [2021-12-17 04:41:06,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:41:06,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:41:06,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:41:06,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:41:06,438 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:41:06,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label46.c [2021-12-17 04:41:06,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a93ac2dad/80869dc44a4e4551a35c57b2544a1471/FLAGcd4043a05 [2021-12-17 04:41:07,080 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:41:07,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label46.c [2021-12-17 04:41:07,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a93ac2dad/80869dc44a4e4551a35c57b2544a1471/FLAGcd4043a05 [2021-12-17 04:41:07,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a93ac2dad/80869dc44a4e4551a35c57b2544a1471 [2021-12-17 04:41:07,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:41:07,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:41:07,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:41:07,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:41:07,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:41:07,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:41:07" (1/1) ... [2021-12-17 04:41:07,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42caf9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:07, skipping insertion in model container [2021-12-17 04:41:07,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:41:07" (1/1) ... [2021-12-17 04:41:07,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:41:07,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:41:07,640 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_label46.c[9366,9379] [2021-12-17 04:41:08,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:41:08,283 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:41:08,316 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_label46.c[9366,9379] [2021-12-17 04:41:08,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:41:08,684 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:41:08,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08 WrapperNode [2021-12-17 04:41:08,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:41:08,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:41:08,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:41:08,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:41:08,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:08,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,136 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:41:09,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:41:09,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:41:09,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:41:09,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:41:09,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:41:09,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:41:09,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:41:09,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:41:09,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (1/1) ... [2021-12-17 04:41:09,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:41:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:41:09,656 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 04:41:09,657 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 04:41:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:41:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:41:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:41:09,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:41:09,746 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:41:09,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:41:13,361 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:41:13,380 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:41:13,384 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:41:13,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:41:13 BoogieIcfgContainer [2021-12-17 04:41:13,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:41:13,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:41:13,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:41:13,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:41:13,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:41:07" (1/3) ... [2021-12-17 04:41:13,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37eb1b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:41:13, skipping insertion in model container [2021-12-17 04:41:13,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:08" (2/3) ... [2021-12-17 04:41:13,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37eb1b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:41:13, skipping insertion in model container [2021-12-17 04:41:13,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:41:13" (3/3) ... [2021-12-17 04:41:13,395 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label46.c [2021-12-17 04:41:13,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:41:13,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:41:13,432 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:41:13,437 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 04:41:13,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:41:13,459 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 04:41:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 04:41:13,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:13,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:13,466 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-12-17 04:41:13,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438771281] [2021-12-17 04:41:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:13,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:13,757 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 04:41:13,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:13,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438771281] [2021-12-17 04:41:13,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438771281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:13,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:13,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:13,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079546710] [2021-12-17 04:41:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:13,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:13,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:13,791 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 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:19,331 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-17 04:41:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:19,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-17 04:41:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:19,372 INFO L225 Difference]: With dead ends: 3829 [2021-12-17 04:41:19,372 INFO L226 Difference]: Without dead ends: 2664 [2021-12-17 04:41:19,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:41:19,383 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2658 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2658 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:19,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2658 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 04:41:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-17 04:41:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-17 04:41:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-17 04:41:19,493 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 66 [2021-12-17 04:41:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:19,494 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-17 04:41:19,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-17 04:41:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 04:41:19,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:19,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:41:19,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:41:19,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1130712773, now seen corresponding path program 1 times [2021-12-17 04:41:19,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636036599] [2021-12-17 04:41:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:19,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:19,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:19,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636036599] [2021-12-17 04:41:19,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636036599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:19,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:19,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:19,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271627637] [2021-12-17 04:41:19,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:19,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:19,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:19,698 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:25,398 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2021-12-17 04:41:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:25,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2021-12-17 04:41:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:25,419 INFO L225 Difference]: With dead ends: 7864 [2021-12-17 04:41:25,419 INFO L226 Difference]: Without dead ends: 5990 [2021-12-17 04:41:25,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:25,429 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 1613 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:25,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1613 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 04:41:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-12-17 04:41:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2021-12-17 04:41:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2021-12-17 04:41:25,532 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 191 [2021-12-17 04:41:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2021-12-17 04:41:25,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2021-12-17 04:41:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-17 04:41:25,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:25,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:25,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:41:25,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:25,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash -705330670, now seen corresponding path program 1 times [2021-12-17 04:41:25,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:25,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801978603] [2021-12-17 04:41:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:25,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:41:25,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801978603] [2021-12-17 04:41:25,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801978603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:25,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:25,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:41:25,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498593697] [2021-12-17 04:41:25,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:25,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:25,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:25,667 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:28,773 INFO L93 Difference]: Finished difference Result 15687 states and 23390 transitions. [2021-12-17 04:41:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 233 [2021-12-17 04:41:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:28,807 INFO L225 Difference]: With dead ends: 15687 [2021-12-17 04:41:28,807 INFO L226 Difference]: Without dead ends: 10617 [2021-12-17 04:41:28,815 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 04:41:28,816 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:28,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:41:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2021-12-17 04:41:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2021-12-17 04:41:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2021-12-17 04:41:28,995 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 233 [2021-12-17 04:41:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:28,995 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2021-12-17 04:41:28,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2021-12-17 04:41:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-17 04:41:29,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:29,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:29,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:41:29,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash 55372431, now seen corresponding path program 1 times [2021-12-17 04:41:29,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:29,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690399367] [2021-12-17 04:41:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:29,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:41:29,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:29,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690399367] [2021-12-17 04:41:29,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690399367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:29,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:29,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:41:29,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23958017] [2021-12-17 04:41:29,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:29,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:29,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:29,115 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:31,883 INFO L93 Difference]: Finished difference Result 29087 states and 40052 transitions. [2021-12-17 04:41:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 247 [2021-12-17 04:41:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:31,925 INFO L225 Difference]: With dead ends: 29087 [2021-12-17 04:41:31,925 INFO L226 Difference]: Without dead ends: 19268 [2021-12-17 04:41:31,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:31,989 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:31,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 987 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:41:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-12-17 04:41:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 17691. [2021-12-17 04:41:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17691 states, 17690 states have (on average 1.2688524590163934) internal successors, (22446), 17690 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17691 states to 17691 states and 22446 transitions. [2021-12-17 04:41:32,210 INFO L78 Accepts]: Start accepts. Automaton has 17691 states and 22446 transitions. Word has length 247 [2021-12-17 04:41:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:32,210 INFO L470 AbstractCegarLoop]: Abstraction has 17691 states and 22446 transitions. [2021-12-17 04:41:32,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 17691 states and 22446 transitions. [2021-12-17 04:41:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-17 04:41:32,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:32,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:41:32,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:41:32,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1367122238, now seen corresponding path program 1 times [2021-12-17 04:41:32,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:32,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726666515] [2021-12-17 04:41:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:32,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:32,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726666515] [2021-12-17 04:41:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726666515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:32,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:32,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:32,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630792638] [2021-12-17 04:41:32,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:32,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:32,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:32,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:32,304 INFO L87 Difference]: Start difference. First operand 17691 states and 22446 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:35,342 INFO L93 Difference]: Finished difference Result 51136 states and 65282 transitions. [2021-12-17 04:41:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 265 [2021-12-17 04:41:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:35,393 INFO L225 Difference]: With dead ends: 51136 [2021-12-17 04:41:35,393 INFO L226 Difference]: Without dead ends: 34234 [2021-12-17 04:41:35,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:35,414 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 859 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:35,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:41:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34234 states. [2021-12-17 04:41:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34234 to 34224. [2021-12-17 04:41:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34224 states, 34223 states have (on average 1.2045115857756479) internal successors, (41222), 34223 states have internal predecessors, (41222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34224 states to 34224 states and 41222 transitions. [2021-12-17 04:41:35,971 INFO L78 Accepts]: Start accepts. Automaton has 34224 states and 41222 transitions. Word has length 265 [2021-12-17 04:41:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:35,972 INFO L470 AbstractCegarLoop]: Abstraction has 34224 states and 41222 transitions. [2021-12-17 04:41:35,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 34224 states and 41222 transitions. [2021-12-17 04:41:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-17 04:41:35,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:35,979 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:35,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:41:35,980 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -149242170, now seen corresponding path program 1 times [2021-12-17 04:41:35,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474504926] [2021-12-17 04:41:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:35,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:41:36,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474504926] [2021-12-17 04:41:36,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474504926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:36,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:36,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:36,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379711579] [2021-12-17 04:41:36,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:36,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:36,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:36,092 INFO L87 Difference]: Start difference. First operand 34224 states and 41222 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:42,191 INFO L93 Difference]: Finished difference Result 93055 states and 113454 transitions. [2021-12-17 04:41:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 334 [2021-12-17 04:41:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:42,272 INFO L225 Difference]: With dead ends: 93055 [2021-12-17 04:41:42,273 INFO L226 Difference]: Without dead ends: 59620 [2021-12-17 04:41:42,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:42,296 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1747 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6069 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 7253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:42,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1747 Valid, 699 Invalid, 7253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 6069 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 04:41:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59620 states. [2021-12-17 04:41:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59620 to 59498. [2021-12-17 04:41:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59498 states, 59497 states have (on average 1.1958754222901995) internal successors, (71151), 59497 states have internal predecessors, (71151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59498 states to 59498 states and 71151 transitions. [2021-12-17 04:41:43,073 INFO L78 Accepts]: Start accepts. Automaton has 59498 states and 71151 transitions. Word has length 334 [2021-12-17 04:41:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:43,074 INFO L470 AbstractCegarLoop]: Abstraction has 59498 states and 71151 transitions. [2021-12-17 04:41:43,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59498 states and 71151 transitions. [2021-12-17 04:41:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-17 04:41:43,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:43,080 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:43,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:41:43,080 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1385907952, now seen corresponding path program 1 times [2021-12-17 04:41:43,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186090799] [2021-12-17 04:41:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:43,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:41:43,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:43,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186090799] [2021-12-17 04:41:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186090799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:43,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:43,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:43,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127041290] [2021-12-17 04:41:43,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:43,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:43,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:43,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:43,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:43,174 INFO L87 Difference]: Start difference. First operand 59498 states and 71151 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:46,770 INFO L93 Difference]: Finished difference Result 141070 states and 167524 transitions. [2021-12-17 04:41:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 349 [2021-12-17 04:41:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:46,904 INFO L225 Difference]: With dead ends: 141070 [2021-12-17 04:41:46,904 INFO L226 Difference]: Without dead ends: 82361 [2021-12-17 04:41:46,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:46,950 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 755 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:46,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 1992 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:41:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82361 states. [2021-12-17 04:41:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82361 to 82325. [2021-12-17 04:41:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82325 states, 82324 states have (on average 1.1649336766920946) internal successors, (95902), 82324 states have internal predecessors, (95902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82325 states to 82325 states and 95902 transitions. [2021-12-17 04:41:48,024 INFO L78 Accepts]: Start accepts. Automaton has 82325 states and 95902 transitions. Word has length 349 [2021-12-17 04:41:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:48,025 INFO L470 AbstractCegarLoop]: Abstraction has 82325 states and 95902 transitions. [2021-12-17 04:41:48,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 82325 states and 95902 transitions. [2021-12-17 04:41:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-17 04:41:48,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:48,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:48,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:41:48,033 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:48,033 INFO L85 PathProgramCache]: Analyzing trace with hash -788002906, now seen corresponding path program 1 times [2021-12-17 04:41:48,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:48,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298620360] [2021-12-17 04:41:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:48,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 271 proven. 110 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:41:48,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:48,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298620360] [2021-12-17 04:41:48,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298620360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:41:48,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544347393] [2021-12-17 04:41:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:48,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:41:48,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:41:48,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:41:48,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:41:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:41:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:41:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:41:49,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:41:49,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544347393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:49,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:41:49,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:41:49,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450921687] [2021-12-17 04:41:49,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:49,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:49,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:41:49,123 INFO L87 Difference]: Start difference. First operand 82325 states and 95902 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:52,171 INFO L93 Difference]: Finished difference Result 163859 states and 191009 transitions. [2021-12-17 04:41:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 378 [2021-12-17 04:41:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:52,266 INFO L225 Difference]: With dead ends: 163859 [2021-12-17 04:41:52,267 INFO L226 Difference]: Without dead ends: 82323 [2021-12-17 04:41:52,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:41:52,308 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 1138 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:52,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1447 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:41:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82323 states. [2021-12-17 04:41:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82323 to 82322. [2021-12-17 04:41:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82322 states, 82321 states have (on average 1.1274765855614) internal successors, (92815), 82321 states have internal predecessors, (92815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82322 states to 82322 states and 92815 transitions. [2021-12-17 04:41:53,469 INFO L78 Accepts]: Start accepts. Automaton has 82322 states and 92815 transitions. Word has length 378 [2021-12-17 04:41:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:53,469 INFO L470 AbstractCegarLoop]: Abstraction has 82322 states and 92815 transitions. [2021-12-17 04:41:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 82322 states and 92815 transitions. [2021-12-17 04:41:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-17 04:41:53,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:53,476 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:41:53,496 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 04:41:53,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:41:53,693 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1962625282, now seen corresponding path program 1 times [2021-12-17 04:41:53,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:53,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787902689] [2021-12-17 04:41:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:53,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:41:53,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787902689] [2021-12-17 04:41:53,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787902689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:53,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:53,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:53,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761871182] [2021-12-17 04:41:53,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:53,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:53,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:53,781 INFO L87 Difference]: Start difference. First operand 82322 states and 92815 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:56,956 INFO L93 Difference]: Finished difference Result 163832 states and 184423 transitions. [2021-12-17 04:41:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2021-12-17 04:41:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:57,051 INFO L225 Difference]: With dead ends: 163832 [2021-12-17 04:41:57,052 INFO L226 Difference]: Without dead ends: 81511 [2021-12-17 04:41:57,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:57,074 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 1035 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:57,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1639 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:41:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81511 states. [2021-12-17 04:41:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81511 to 74418. [2021-12-17 04:41:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74418 states, 74417 states have (on average 1.0911350901003802) internal successors, (81199), 74417 states have internal predecessors, (81199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74418 states to 74418 states and 81199 transitions. [2021-12-17 04:41:58,021 INFO L78 Accepts]: Start accepts. Automaton has 74418 states and 81199 transitions. Word has length 383 [2021-12-17 04:41:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:58,021 INFO L470 AbstractCegarLoop]: Abstraction has 74418 states and 81199 transitions. [2021-12-17 04:41:58,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 74418 states and 81199 transitions. [2021-12-17 04:41:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-12-17 04:41:58,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:58,026 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:41:58,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:41:58,027 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash 357120976, now seen corresponding path program 1 times [2021-12-17 04:41:58,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:58,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893684798] [2021-12-17 04:41:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:58,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:41:58,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893684798] [2021-12-17 04:41:58,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893684798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:58,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:58,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:58,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241115228] [2021-12-17 04:41:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:58,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:58,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:58,155 INFO L87 Difference]: Start difference. First operand 74418 states and 81199 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 04:42:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:01,211 INFO L93 Difference]: Finished difference Result 150434 states and 164025 transitions. [2021-12-17 04:42:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 393 [2021-12-17 04:42:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:01,300 INFO L225 Difference]: With dead ends: 150434 [2021-12-17 04:42:01,300 INFO L226 Difference]: Without dead ends: 76805 [2021-12-17 04:42:01,330 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 04:42:01,330 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 806 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:01,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 1111 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:42:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76805 states. [2021-12-17 04:42:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76805 to 74417. [2021-12-17 04:42:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74417 states, 74416 states have (on average 1.0810712749946247) internal successors, (80449), 74416 states have internal predecessors, (80449), 0 states have call successors, (0), 0 states 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 04:42:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74417 states to 74417 states and 80449 transitions. [2021-12-17 04:42:02,171 INFO L78 Accepts]: Start accepts. Automaton has 74417 states and 80449 transitions. Word has length 393 [2021-12-17 04:42:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:02,171 INFO L470 AbstractCegarLoop]: Abstraction has 74417 states and 80449 transitions. [2021-12-17 04:42:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 04:42:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 74417 states and 80449 transitions. [2021-12-17 04:42:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-17 04:42:02,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:02,176 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:02,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:42:02,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash -284013078, now seen corresponding path program 1 times [2021-12-17 04:42:02,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140140415] [2021-12-17 04:42:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:02,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-17 04:42:02,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:02,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140140415] [2021-12-17 04:42:02,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140140415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:02,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:02,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:02,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700318403] [2021-12-17 04:42:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:02,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:02,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:02,514 INFO L87 Difference]: Start difference. First operand 74417 states and 80449 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 04:42:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:06,461 INFO L93 Difference]: Finished difference Result 181234 states and 196544 transitions. [2021-12-17 04:42:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 395 [2021-12-17 04:42:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:06,592 INFO L225 Difference]: With dead ends: 181234 [2021-12-17 04:42:06,592 INFO L226 Difference]: Without dead ends: 106818 [2021-12-17 04:42:06,634 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 04:42:06,634 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 931 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 3723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:06,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 681 Invalid, 3723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 04:42:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106818 states. [2021-12-17 04:42:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106818 to 101986. [2021-12-17 04:42:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101986 states, 101985 states have (on average 1.08779722508212) internal successors, (110939), 101985 states have internal predecessors, (110939), 0 states have call successors, (0), 0 states 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 04:42:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101986 states to 101986 states and 110939 transitions. [2021-12-17 04:42:07,869 INFO L78 Accepts]: Start accepts. Automaton has 101986 states and 110939 transitions. Word has length 395 [2021-12-17 04:42:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:07,870 INFO L470 AbstractCegarLoop]: Abstraction has 101986 states and 110939 transitions. [2021-12-17 04:42:07,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 04:42:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 101986 states and 110939 transitions. [2021-12-17 04:42:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-17 04:42:07,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:07,879 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:07,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:42:07,880 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1321188077, now seen corresponding path program 1 times [2021-12-17 04:42:07,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:07,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430314119] [2021-12-17 04:42:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:07,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 610 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:42:07,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430314119] [2021-12-17 04:42:07,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430314119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:07,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:07,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:07,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100806640] [2021-12-17 04:42:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:07,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:07,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:07,995 INFO L87 Difference]: Start difference. First operand 101986 states and 110939 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 04:42:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:11,911 INFO L93 Difference]: Finished difference Result 235464 states and 258400 transitions. [2021-12-17 04:42:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 469 [2021-12-17 04:42:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:12,092 INFO L225 Difference]: With dead ends: 235464 [2021-12-17 04:42:12,093 INFO L226 Difference]: Without dead ends: 134267 [2021-12-17 04:42:12,145 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 04:42:12,146 INFO L933 BasicCegarLoop]: 749 mSDtfsCounter, 927 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:12,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 829 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [959 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:42:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134267 states. [2021-12-17 04:42:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134267 to 131889. [2021-12-17 04:42:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131889 states, 131888 states have (on average 1.0935035787941283) internal successors, (144220), 131888 states have internal predecessors, (144220), 0 states have call successors, (0), 0 states 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 04:42:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131889 states to 131889 states and 144220 transitions. [2021-12-17 04:42:13,675 INFO L78 Accepts]: Start accepts. Automaton has 131889 states and 144220 transitions. Word has length 469 [2021-12-17 04:42:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:13,676 INFO L470 AbstractCegarLoop]: Abstraction has 131889 states and 144220 transitions. [2021-12-17 04:42:13,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 04:42:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 131889 states and 144220 transitions. [2021-12-17 04:42:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-17 04:42:13,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:13,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:13,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:42:13,685 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash 389350022, now seen corresponding path program 1 times [2021-12-17 04:42:13,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:13,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087959768] [2021-12-17 04:42:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:13,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 04:42:14,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:14,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087959768] [2021-12-17 04:42:14,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087959768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:14,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:14,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:14,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818530147] [2021-12-17 04:42:14,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:14,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:14,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:14,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:14,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:14,054 INFO L87 Difference]: Start difference. First operand 131889 states and 144220 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 04:42:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:17,612 INFO L93 Difference]: Finished difference Result 264564 states and 289233 transitions. [2021-12-17 04:42:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 470 [2021-12-17 04:42:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:17,802 INFO L225 Difference]: With dead ends: 264564 [2021-12-17 04:42:17,802 INFO L226 Difference]: Without dead ends: 133464 [2021-12-17 04:42:17,862 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 04:42:17,863 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 971 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:17,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 1465 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:42:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133464 states. [2021-12-17 04:42:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133464 to 130302. [2021-12-17 04:42:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130302 states, 130301 states have (on average 1.067827568476067) internal successors, (139139), 130301 states have internal predecessors, (139139), 0 states have call successors, (0), 0 states 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 04:42:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130302 states to 130302 states and 139139 transitions. [2021-12-17 04:42:19,527 INFO L78 Accepts]: Start accepts. Automaton has 130302 states and 139139 transitions. Word has length 470 [2021-12-17 04:42:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:19,528 INFO L470 AbstractCegarLoop]: Abstraction has 130302 states and 139139 transitions. [2021-12-17 04:42:19,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 04:42:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 130302 states and 139139 transitions. [2021-12-17 04:42:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2021-12-17 04:42:19,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:19,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-17 04:42:19,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:42:19,547 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 170270537, now seen corresponding path program 1 times [2021-12-17 04:42:19,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544690031] [2021-12-17 04:42:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:19,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:19,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:19,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544690031] [2021-12-17 04:42:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544690031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:19,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:19,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:19,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439576988] [2021-12-17 04:42:19,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:19,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:19,767 INFO L87 Difference]: Start difference. First operand 130302 states and 139139 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 04:42:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:23,707 INFO L93 Difference]: Finished difference Result 270016 states and 288502 transitions. [2021-12-17 04:42:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:23,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 553 [2021-12-17 04:42:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:23,915 INFO L225 Difference]: With dead ends: 270016 [2021-12-17 04:42:23,915 INFO L226 Difference]: Without dead ends: 140503 [2021-12-17 04:42:23,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 04:42:23,981 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 1150 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:23,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 385 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:42:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140503 states. [2021-12-17 04:42:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140503 to 136568. [2021-12-17 04:42:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136568 states, 136567 states have (on average 1.0601902362942732) internal successors, (144787), 136567 states have internal predecessors, (144787), 0 states have call successors, (0), 0 states 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 04:42:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136568 states to 136568 states and 144787 transitions. [2021-12-17 04:42:25,798 INFO L78 Accepts]: Start accepts. Automaton has 136568 states and 144787 transitions. Word has length 553 [2021-12-17 04:42:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:25,798 INFO L470 AbstractCegarLoop]: Abstraction has 136568 states and 144787 transitions. [2021-12-17 04:42:25,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 04:42:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 136568 states and 144787 transitions. [2021-12-17 04:42:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-12-17 04:42:25,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:25,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 04:42:25,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:42:25,820 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2028799798, now seen corresponding path program 1 times [2021-12-17 04:42:25,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:25,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752690941] [2021-12-17 04:42:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:25,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 368 proven. 110 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:42:26,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752690941] [2021-12-17 04:42:26,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752690941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056374714] [2021-12-17 04:42:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:26,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:26,030 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 04:42:26,031 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 04:42:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:42:26,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-17 04:42:27,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:27,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056374714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:27,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:27,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:42:27,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187388348] [2021-12-17 04:42:27,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:27,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:27,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:27,382 INFO L87 Difference]: Start difference. First operand 136568 states and 144787 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 04:42:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:30,559 INFO L93 Difference]: Finished difference Result 275506 states and 292004 transitions. [2021-12-17 04:42:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:30,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 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 557 [2021-12-17 04:42:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:30,717 INFO L225 Difference]: With dead ends: 275506 [2021-12-17 04:42:30,717 INFO L226 Difference]: Without dead ends: 138151 [2021-12-17 04:42:30,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:30,795 INFO L933 BasicCegarLoop]: 988 mSDtfsCounter, 682 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:30,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1121 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:42:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138151 states. [2021-12-17 04:42:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138151 to 138140. [2021-12-17 04:42:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138140 states, 138139 states have (on average 1.054821592743541) internal successors, (145712), 138139 states have internal predecessors, (145712), 0 states have call successors, (0), 0 states 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 04:42:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138140 states to 138140 states and 145712 transitions. [2021-12-17 04:42:32,552 INFO L78 Accepts]: Start accepts. Automaton has 138140 states and 145712 transitions. Word has length 557 [2021-12-17 04:42:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:32,553 INFO L470 AbstractCegarLoop]: Abstraction has 138140 states and 145712 transitions. [2021-12-17 04:42:32,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 04:42:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 138140 states and 145712 transitions. [2021-12-17 04:42:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2021-12-17 04:42:32,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:32,567 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:42:32,583 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 04:42:32,771 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,SelfDestructingSolverStorable14 [2021-12-17 04:42:32,772 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2138163838, now seen corresponding path program 1 times [2021-12-17 04:42:32,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:32,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644508300] [2021-12-17 04:42:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:32,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-17 04:42:32,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644508300] [2021-12-17 04:42:32,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644508300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:32,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:32,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:32,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009677856] [2021-12-17 04:42:32,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:32,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:32,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:32,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:32,910 INFO L87 Difference]: Start difference. First operand 138140 states and 145712 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 04:42:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:36,731 INFO L93 Difference]: Finished difference Result 303816 states and 321639 transitions. [2021-12-17 04:42:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 608 [2021-12-17 04:42:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:36,911 INFO L225 Difference]: With dead ends: 303816 [2021-12-17 04:42:36,911 INFO L226 Difference]: Without dead ends: 164891 [2021-12-17 04:42:36,946 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 04:42:36,947 INFO L933 BasicCegarLoop]: 1640 mSDtfsCounter, 701 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:36,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1772 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:42:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164891 states. [2021-12-17 04:42:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164891 to 163303. [2021-12-17 04:42:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163303 states, 163302 states have (on average 1.0492033165546044) internal successors, (171337), 163302 states have internal predecessors, (171337), 0 states have call successors, (0), 0 states 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 04:42:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163303 states to 163303 states and 171337 transitions. [2021-12-17 04:42:39,081 INFO L78 Accepts]: Start accepts. Automaton has 163303 states and 171337 transitions. Word has length 608 [2021-12-17 04:42:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:39,081 INFO L470 AbstractCegarLoop]: Abstraction has 163303 states and 171337 transitions. [2021-12-17 04:42:39,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 04:42:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 163303 states and 171337 transitions. [2021-12-17 04:42:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2021-12-17 04:42:39,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:39,096 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:42:39,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:42:39,096 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:39,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:39,097 INFO L85 PathProgramCache]: Analyzing trace with hash 922010112, now seen corresponding path program 1 times [2021-12-17 04:42:39,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:39,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776729019] [2021-12-17 04:42:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:39,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-17 04:42:39,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776729019] [2021-12-17 04:42:39,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776729019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:39,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:39,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:39,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948550368] [2021-12-17 04:42:39,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:39,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:39,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:39,244 INFO L87 Difference]: Start difference. First operand 163303 states and 171337 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 04:42:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:43,370 INFO L93 Difference]: Finished difference Result 355825 states and 373417 transitions. [2021-12-17 04:42:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 608 [2021-12-17 04:42:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:43,623 INFO L225 Difference]: With dead ends: 355825 [2021-12-17 04:42:43,623 INFO L226 Difference]: Without dead ends: 193311 [2021-12-17 04:42:43,712 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 04:42:43,713 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 777 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:43,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 803 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:42:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193311 states.