./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label59.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/Problem17_label59.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 9689a0609fceafc63efca466da3c77b2a75cad0dc813552287d39be336e7ab21 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:07:12,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:07:12,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:07:12,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:07:12,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:07:12,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:07:12,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:07:12,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:07:12,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:07:12,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:07:12,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:07:12,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:07:12,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:07:12,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:07:12,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:07:12,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:07:12,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:07:12,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:07:12,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:07:12,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:07:12,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:07:12,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:07:12,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:07:12,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:07:12,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:07:12,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:07:12,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:07:12,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:07:12,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:07:12,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:07:12,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:07:12,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:07:12,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:07:12,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:07:12,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:07:12,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:07:12,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:07:12,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:07:12,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:07:12,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:07:12,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:07:12,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:07:12,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:07:12,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:07:12,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:07:12,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:07:12,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:07:12,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:07:12,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:07:12,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:07:12,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:07:12,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:07:12,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:07:12,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:07:12,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:07:12,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:07:12,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:07:12,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:07:12,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:07:12,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:07:12,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:07:12,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:07:12,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:07:12,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:07:12,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:07:12,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:07:12,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:07:12,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:07:12,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:07:12,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:07:12,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:07:12,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:07:12,250 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:07:12,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:07:12,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:07:12,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:07:12,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9689a0609fceafc63efca466da3c77b2a75cad0dc813552287d39be336e7ab21 [2021-12-17 05:07:12,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:07:12,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:07:12,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:07:12,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:07:12,494 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:07:12,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label59.c [2021-12-17 05:07:12,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22051109a/7a52e76215cd4e58a69bab2319896f7d/FLAGd6bddf5e6 [2021-12-17 05:07:13,097 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:07:13,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label59.c [2021-12-17 05:07:13,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22051109a/7a52e76215cd4e58a69bab2319896f7d/FLAGd6bddf5e6 [2021-12-17 05:07:13,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22051109a/7a52e76215cd4e58a69bab2319896f7d [2021-12-17 05:07:13,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:07:13,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:07:13,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:07:13,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:07:13,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:07:13,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:07:13" (1/1) ... [2021-12-17 05:07:13,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670838e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:13, skipping insertion in model container [2021-12-17 05:07:13,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:07:13" (1/1) ... [2021-12-17 05:07:13,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:07:13,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:07:13,868 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label59.c[4894,4907] [2021-12-17 05:07:14,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:07:14,460 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:07:14,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label59.c[4894,4907] [2021-12-17 05:07:14,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:07:14,728 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:07:14,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14 WrapperNode [2021-12-17 05:07:14,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:07:14,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:07:14,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:07:14,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:07:14,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:14,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,014 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-17 05:07:15,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:07:15,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:07:15,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:07:15,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:07:15,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:07:15,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:07:15,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:07:15,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:07:15,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (1/1) ... [2021-12-17 05:07:15,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:07:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:07:15,432 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 05:07:15,459 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 05:07:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:07:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:07:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:07:15,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:07:15,528 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:07:15,528 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:07:18,483 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:07:18,497 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:07:18,499 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:07:18,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:07:18 BoogieIcfgContainer [2021-12-17 05:07:18,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:07:18,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:07:18,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:07:18,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:07:18,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:07:13" (1/3) ... [2021-12-17 05:07:18,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3aaa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:07:18, skipping insertion in model container [2021-12-17 05:07:18,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:07:14" (2/3) ... [2021-12-17 05:07:18,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3aaa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:07:18, skipping insertion in model container [2021-12-17 05:07:18,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:07:18" (3/3) ... [2021-12-17 05:07:18,508 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label59.c [2021-12-17 05:07:18,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:07:18,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:07:18,567 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:07:18,576 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 05:07:18,576 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:07:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:07:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 05:07:18,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:18,621 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] [2021-12-17 05:07:18,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2021-12-17 05:07:18,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:18,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193967460] [2021-12-17 05:07:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:18,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:18,838 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 05:07:18,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:18,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193967460] [2021-12-17 05:07:18,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193967460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:18,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:18,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:07:18,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992105271] [2021-12-17 05:07:18,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:18,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:18,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:18,875 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 05:07:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:21,505 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2021-12-17 05:07:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-12-17 05:07:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:21,524 INFO L225 Difference]: With dead ends: 1680 [2021-12-17 05:07:21,524 INFO L226 Difference]: Without dead ends: 1011 [2021-12-17 05:07:21,528 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 05:07:21,531 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 549 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:21,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 05:07:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-17 05:07:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2021-12-17 05:07:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states 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 05:07:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2021-12-17 05:07:21,607 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 32 [2021-12-17 05:07:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:21,608 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2021-12-17 05:07:21,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 05:07:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2021-12-17 05:07:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 05:07:21,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:21,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:21,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:07:21,611 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 800824111, now seen corresponding path program 1 times [2021-12-17 05:07:21,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:21,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981592731] [2021-12-17 05:07:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:21,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:21,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981592731] [2021-12-17 05:07:21,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981592731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:21,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:21,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:07:21,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880940066] [2021-12-17 05:07:21,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:21,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:21,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:21,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:21,732 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 05:07:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:23,842 INFO L93 Difference]: Finished difference Result 2873 states and 5026 transitions. [2021-12-17 05:07:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:23,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-17 05:07:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:23,850 INFO L225 Difference]: With dead ends: 2873 [2021-12-17 05:07:23,850 INFO L226 Difference]: Without dead ends: 1879 [2021-12-17 05:07:23,851 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 05:07:23,853 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:23,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 521 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 05:07:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-12-17 05:07:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1870. [2021-12-17 05:07:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4724451578384163) internal successors, (2752), 1869 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states 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 05:07:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2752 transitions. [2021-12-17 05:07:23,915 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2752 transitions. Word has length 97 [2021-12-17 05:07:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:23,916 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2752 transitions. [2021-12-17 05:07:23,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 05:07:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2752 transitions. [2021-12-17 05:07:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 05:07:23,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:23,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:07:23,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1125160642, now seen corresponding path program 1 times [2021-12-17 05:07:23,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714991740] [2021-12-17 05:07:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:23,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:24,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714991740] [2021-12-17 05:07:24,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714991740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:24,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:24,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:24,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959333213] [2021-12-17 05:07:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:24,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:24,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:24,009 INFO L87 Difference]: Start difference. First operand 1870 states and 2752 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 05:07:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:26,105 INFO L93 Difference]: Finished difference Result 5454 states and 8042 transitions. [2021-12-17 05:07:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:26,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-12-17 05:07:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:26,119 INFO L225 Difference]: With dead ends: 5454 [2021-12-17 05:07:26,119 INFO L226 Difference]: Without dead ends: 3586 [2021-12-17 05:07:26,122 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 05:07:26,125 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 462 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:26,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 05:07:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-12-17 05:07:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2021-12-17 05:07:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states 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 05:07:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2021-12-17 05:07:26,182 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 102 [2021-12-17 05:07:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2021-12-17 05:07:26,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 05:07:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2021-12-17 05:07:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 05:07:26,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:26,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:26,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:07:26,186 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1099632395, now seen corresponding path program 1 times [2021-12-17 05:07:26,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323898249] [2021-12-17 05:07:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:26,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:26,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323898249] [2021-12-17 05:07:26,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323898249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:26,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:26,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:26,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444876308] [2021-12-17 05:07:26,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:26,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:07:26,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:26,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:07:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:07:26,406 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 05:07:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:28,382 INFO L93 Difference]: Finished difference Result 7618 states and 10088 transitions. [2021-12-17 05:07:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 05:07:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-12-17 05:07:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:28,396 INFO L225 Difference]: With dead ends: 7618 [2021-12-17 05:07:28,396 INFO L226 Difference]: Without dead ends: 4037 [2021-12-17 05:07:28,400 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 05:07:28,401 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:28,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 05:07:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-17 05:07:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-17 05:07:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3017219865235836) internal successors, (5216), 4007 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states 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 05:07:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5216 transitions. [2021-12-17 05:07:28,464 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5216 transitions. Word has length 143 [2021-12-17 05:07:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:28,465 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5216 transitions. [2021-12-17 05:07:28,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 05:07:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5216 transitions. [2021-12-17 05:07:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 05:07:28,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:28,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:07:28,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:07:28,468 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash 98929401, now seen corresponding path program 1 times [2021-12-17 05:07:28,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:28,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626206820] [2021-12-17 05:07:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:28,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 05:07:28,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:28,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626206820] [2021-12-17 05:07:28,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626206820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:28,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:28,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:07:28,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083205077] [2021-12-17 05:07:28,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:28,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:28,599 INFO L87 Difference]: Start difference. First operand 4008 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 05:07:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:30,262 INFO L93 Difference]: Finished difference Result 10996 states and 14542 transitions. [2021-12-17 05:07:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:30,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 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 171 [2021-12-17 05:07:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:30,280 INFO L225 Difference]: With dead ends: 10996 [2021-12-17 05:07:30,280 INFO L226 Difference]: Without dead ends: 5711 [2021-12-17 05:07:30,285 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 05:07:30,286 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:30,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:07:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-17 05:07:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4431. [2021-12-17 05:07:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.209255079006772) internal successors, (5357), 4430 states have internal predecessors, (5357), 0 states have call successors, (0), 0 states 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 05:07:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5357 transitions. [2021-12-17 05:07:30,352 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5357 transitions. Word has length 171 [2021-12-17 05:07:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:30,353 INFO L470 AbstractCegarLoop]: Abstraction has 4431 states and 5357 transitions. [2021-12-17 05:07:30,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 05:07:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5357 transitions. [2021-12-17 05:07:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 05:07:30,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:30,356 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 05:07:30,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 05:07:30,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:30,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1487374155, now seen corresponding path program 1 times [2021-12-17 05:07:30,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993632624] [2021-12-17 05:07:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:30,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:30,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:30,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993632624] [2021-12-17 05:07:30,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993632624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:30,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:30,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:30,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294980371] [2021-12-17 05:07:30,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:30,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:30,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:30,451 INFO L87 Difference]: Start difference. First operand 4431 states and 5357 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 05:07:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:31,899 INFO L93 Difference]: Finished difference Result 11410 states and 14012 transitions. [2021-12-17 05:07:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2021-12-17 05:07:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:31,917 INFO L225 Difference]: With dead ends: 11410 [2021-12-17 05:07:31,918 INFO L226 Difference]: Without dead ends: 6981 [2021-12-17 05:07:31,923 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 05:07:31,924 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:31,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 05:07:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2021-12-17 05:07:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 6981. [2021-12-17 05:07:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6981 states, 6980 states have (on average 1.1835243553008596) internal successors, (8261), 6980 states have internal predecessors, (8261), 0 states have call successors, (0), 0 states 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 05:07:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 8261 transitions. [2021-12-17 05:07:32,023 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 8261 transitions. Word has length 184 [2021-12-17 05:07:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:32,023 INFO L470 AbstractCegarLoop]: Abstraction has 6981 states and 8261 transitions. [2021-12-17 05:07:32,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 05:07:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 8261 transitions. [2021-12-17 05:07:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-17 05:07:32,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:32,028 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:07:32,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:07:32,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash 670247123, now seen corresponding path program 1 times [2021-12-17 05:07:32,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:32,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950663921] [2021-12-17 05:07:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:32,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 05:07:32,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950663921] [2021-12-17 05:07:32,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950663921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:32,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:32,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:32,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064794915] [2021-12-17 05:07:32,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:32,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:32,174 INFO L87 Difference]: Start difference. First operand 6981 states and 8261 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:07:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:33,818 INFO L93 Difference]: Finished difference Result 17786 states and 21271 transitions. [2021-12-17 05:07:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 264 [2021-12-17 05:07:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:33,847 INFO L225 Difference]: With dead ends: 17786 [2021-12-17 05:07:33,847 INFO L226 Difference]: Without dead ends: 9957 [2021-12-17 05:07:33,855 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 05:07:33,856 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:33,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:07:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2021-12-17 05:07:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 9957. [2021-12-17 05:07:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 1.1449377259943752) internal successors, (11399), 9956 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states 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 05:07:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 11399 transitions. [2021-12-17 05:07:33,990 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 11399 transitions. Word has length 264 [2021-12-17 05:07:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:33,990 INFO L470 AbstractCegarLoop]: Abstraction has 9957 states and 11399 transitions. [2021-12-17 05:07:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:07:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 11399 transitions. [2021-12-17 05:07:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-17 05:07:33,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:33,997 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:07:33,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:07:33,997 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1739275210, now seen corresponding path program 1 times [2021-12-17 05:07:33,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:33,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145510489] [2021-12-17 05:07:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:33,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-17 05:07:34,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145510489] [2021-12-17 05:07:34,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145510489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:34,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:34,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:34,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188472575] [2021-12-17 05:07:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:34,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:34,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:34,155 INFO L87 Difference]: Start difference. First operand 9957 states and 11399 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 05:07:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:35,805 INFO L93 Difference]: Finished difference Result 23316 states and 26854 transitions. [2021-12-17 05:07:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 304 [2021-12-17 05:07:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:35,828 INFO L225 Difference]: With dead ends: 23316 [2021-12-17 05:07:35,829 INFO L226 Difference]: Without dead ends: 12487 [2021-12-17 05:07:35,838 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 05:07:35,839 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 496 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:35,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 680 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:07:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12487 states. [2021-12-17 05:07:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12487 to 12485. [2021-12-17 05:07:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12485 states, 12484 states have (on average 1.1342518423582184) internal successors, (14160), 12484 states have internal predecessors, (14160), 0 states have call successors, (0), 0 states 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 05:07:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12485 states to 12485 states and 14160 transitions. [2021-12-17 05:07:35,976 INFO L78 Accepts]: Start accepts. Automaton has 12485 states and 14160 transitions. Word has length 304 [2021-12-17 05:07:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:35,976 INFO L470 AbstractCegarLoop]: Abstraction has 12485 states and 14160 transitions. [2021-12-17 05:07:35,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 05:07:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12485 states and 14160 transitions. [2021-12-17 05:07:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-17 05:07:35,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:35,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:35,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 05:07:35,990 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1781923912, now seen corresponding path program 1 times [2021-12-17 05:07:35,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557515878] [2021-12-17 05:07:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:35,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:36,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557515878] [2021-12-17 05:07:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557515878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:36,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:36,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:36,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984626348] [2021-12-17 05:07:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:36,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:07:36,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:07:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:07:36,165 INFO L87 Difference]: Start difference. First operand 12485 states and 14160 transitions. Second operand has 4 states, 4 states have (on average 92.75) 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 05:07:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:38,386 INFO L93 Difference]: Finished difference Result 28835 states and 32796 transitions. [2021-12-17 05:07:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:07:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.75) 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 371 [2021-12-17 05:07:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:38,410 INFO L225 Difference]: With dead ends: 28835 [2021-12-17 05:07:38,411 INFO L226 Difference]: Without dead ends: 15927 [2021-12-17 05:07:38,420 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 05:07:38,423 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 625 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:38,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 219 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 05:07:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2021-12-17 05:07:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15922. [2021-12-17 05:07:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15922 states, 15921 states have (on average 1.1432070849820992) internal successors, (18201), 15921 states have internal predecessors, (18201), 0 states have call successors, (0), 0 states 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 05:07:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15922 states to 15922 states and 18201 transitions. [2021-12-17 05:07:38,596 INFO L78 Accepts]: Start accepts. Automaton has 15922 states and 18201 transitions. Word has length 371 [2021-12-17 05:07:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:38,597 INFO L470 AbstractCegarLoop]: Abstraction has 15922 states and 18201 transitions. [2021-12-17 05:07:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) 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 05:07:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 15922 states and 18201 transitions. [2021-12-17 05:07:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-12-17 05:07:38,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:38,606 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:07:38,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:07:38,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1120015303, now seen corresponding path program 1 times [2021-12-17 05:07:38,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:38,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405397739] [2021-12-17 05:07:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:38,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 59 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:38,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405397739] [2021-12-17 05:07:38,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405397739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:07:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127149027] [2021-12-17 05:07:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:38,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:07:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:07:38,786 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 05:07:38,787 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 05:07:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 05:07:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:07:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 59 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:40,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:07:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127149027] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:07:40,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:07:40,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-17 05:07:40,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006008883] [2021-12-17 05:07:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:40,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:07:40,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:07:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:07:40,930 INFO L87 Difference]: Start difference. First operand 15922 states and 18201 transitions. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 05:07:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:43,557 INFO L93 Difference]: Finished difference Result 37372 states and 42569 transitions. [2021-12-17 05:07:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:07:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 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 399 [2021-12-17 05:07:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:43,597 INFO L225 Difference]: With dead ends: 37372 [2021-12-17 05:07:43,598 INFO L226 Difference]: Without dead ends: 20175 [2021-12-17 05:07:43,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 793 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:07:43,615 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 755 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:43,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 144 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 05:07:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-12-17 05:07:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 16345. [2021-12-17 05:07:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16345 states, 16344 states have (on average 1.139623103279491) internal successors, (18626), 16344 states have internal predecessors, (18626), 0 states have call successors, (0), 0 states 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 05:07:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16345 states to 16345 states and 18626 transitions. [2021-12-17 05:07:43,884 INFO L78 Accepts]: Start accepts. Automaton has 16345 states and 18626 transitions. Word has length 399 [2021-12-17 05:07:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:43,885 INFO L470 AbstractCegarLoop]: Abstraction has 16345 states and 18626 transitions. [2021-12-17 05:07:43,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 05:07:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 16345 states and 18626 transitions. [2021-12-17 05:07:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-12-17 05:07:43,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:43,898 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:43,925 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 05:07:44,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 05:07:44,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash -364017495, now seen corresponding path program 1 times [2021-12-17 05:07:44,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392681507] [2021-12-17 05:07:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:44,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 89 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:07:44,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:44,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392681507] [2021-12-17 05:07:44,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392681507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:07:44,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290477809] [2021-12-17 05:07:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:44,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:07:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:07:44,369 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 05:07:44,407 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 05:07:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 05:07:44,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:07:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 215 proven. 73 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 05:07:45,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:07:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 05:07:46,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290477809] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:07:46,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:07:46,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-17 05:07:46,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195937281] [2021-12-17 05:07:46,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:46,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:07:46,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:07:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:07:46,172 INFO L87 Difference]: Start difference. First operand 16345 states and 18626 transitions. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 05:07:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:48,804 INFO L93 Difference]: Finished difference Result 41666 states and 47602 transitions. [2021-12-17 05:07:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:07:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 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 473 [2021-12-17 05:07:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:48,838 INFO L225 Difference]: With dead ends: 41666 [2021-12-17 05:07:48,838 INFO L226 Difference]: Without dead ends: 25748 [2021-12-17 05:07:48,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 941 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:07:48,853 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 840 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:48,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 183 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 05:07:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25748 states. [2021-12-17 05:07:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25748 to 24041. [2021-12-17 05:07:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24041 states, 24040 states have (on average 1.143053244592346) internal successors, (27479), 24040 states have internal predecessors, (27479), 0 states have call successors, (0), 0 states 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 05:07:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24041 states to 24041 states and 27479 transitions. [2021-12-17 05:07:49,133 INFO L78 Accepts]: Start accepts. Automaton has 24041 states and 27479 transitions. Word has length 473 [2021-12-17 05:07:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:49,134 INFO L470 AbstractCegarLoop]: Abstraction has 24041 states and 27479 transitions. [2021-12-17 05:07:49,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 05:07:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24041 states and 27479 transitions. [2021-12-17 05:07:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2021-12-17 05:07:49,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:49,147 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 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] [2021-12-17 05:07:49,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 05:07:49,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 05:07:49,364 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1146283451, now seen corresponding path program 1 times [2021-12-17 05:07:49,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:49,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882972649] [2021-12-17 05:07:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:49,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-17 05:07:49,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:49,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882972649] [2021-12-17 05:07:49,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882972649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:49,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:49,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:49,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356372682] [2021-12-17 05:07:49,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:49,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:49,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:49,612 INFO L87 Difference]: Start difference. First operand 24041 states and 27479 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:07:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:51,115 INFO L93 Difference]: Finished difference Result 56587 states and 64742 transitions. [2021-12-17 05:07:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 529 [2021-12-17 05:07:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:51,156 INFO L225 Difference]: With dead ends: 56587 [2021-12-17 05:07:51,156 INFO L226 Difference]: Without dead ends: 30413 [2021-12-17 05:07:51,180 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 05:07:51,181 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 492 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:51,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 717 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 05:07:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30413 states. [2021-12-17 05:07:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30413 to 30407. [2021-12-17 05:07:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30407 states, 30406 states have (on average 1.1227718213510491) internal successors, (34139), 30406 states have internal predecessors, (34139), 0 states have call successors, (0), 0 states 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 05:07:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30407 states to 30407 states and 34139 transitions. [2021-12-17 05:07:51,664 INFO L78 Accepts]: Start accepts. Automaton has 30407 states and 34139 transitions. Word has length 529 [2021-12-17 05:07:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:51,665 INFO L470 AbstractCegarLoop]: Abstraction has 30407 states and 34139 transitions. [2021-12-17 05:07:51,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:07:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 30407 states and 34139 transitions. [2021-12-17 05:07:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-12-17 05:07:51,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:51,682 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 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] [2021-12-17 05:07:51,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 05:07:51,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash -137792954, now seen corresponding path program 1 times [2021-12-17 05:07:51,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:51,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194974467] [2021-12-17 05:07:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:51,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 05:07:51,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194974467] [2021-12-17 05:07:51,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194974467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:51,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:51,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:51,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696044548] [2021-12-17 05:07:51,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:51,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:51,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:51,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:51,858 INFO L87 Difference]: Start difference. First operand 30407 states and 34139 transitions. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 05:07:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:53,640 INFO L93 Difference]: Finished difference Result 70619 states and 79585 transitions. [2021-12-17 05:07:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 579 [2021-12-17 05:07:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:53,679 INFO L225 Difference]: With dead ends: 70619 [2021-12-17 05:07:53,679 INFO L226 Difference]: Without dead ends: 38082 [2021-12-17 05:07:53,704 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 05:07:53,705 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 426 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:53,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 641 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:07:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38082 states. [2021-12-17 05:07:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38082 to 36801. [2021-12-17 05:07:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36801 states, 36800 states have (on average 1.1255434782608695) internal successors, (41420), 36800 states have internal predecessors, (41420), 0 states have call successors, (0), 0 states 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 05:07:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36801 states to 36801 states and 41420 transitions. [2021-12-17 05:07:54,196 INFO L78 Accepts]: Start accepts. Automaton has 36801 states and 41420 transitions. Word has length 579 [2021-12-17 05:07:54,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:54,197 INFO L470 AbstractCegarLoop]: Abstraction has 36801 states and 41420 transitions. [2021-12-17 05:07:54,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 05:07:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36801 states and 41420 transitions. [2021-12-17 05:07:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2021-12-17 05:07:54,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:54,218 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:54,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 05:07:54,219 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1098099115, now seen corresponding path program 1 times [2021-12-17 05:07:54,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:54,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782722506] [2021-12-17 05:07:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:54,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-12-17 05:07:54,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:54,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782722506] [2021-12-17 05:07:54,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782722506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:54,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:54,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:54,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353285805] [2021-12-17 05:07:54,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:54,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:54,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:54,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:54,498 INFO L87 Difference]: Start difference. First operand 36801 states and 41420 transitions. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 05:07:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:56,138 INFO L93 Difference]: Finished difference Result 88940 states and 100386 transitions. [2021-12-17 05:07:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 658 [2021-12-17 05:07:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:56,216 INFO L225 Difference]: With dead ends: 88940 [2021-12-17 05:07:56,216 INFO L226 Difference]: Without dead ends: 52566 [2021-12-17 05:07:56,248 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 05:07:56,249 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 487 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:56,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 291 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 05:07:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52566 states. [2021-12-17 05:07:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52566 to 52542. [2021-12-17 05:07:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52542 states, 52541 states have (on average 1.1176414609543024) internal successors, (58722), 52541 states have internal predecessors, (58722), 0 states have call successors, (0), 0 states 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 05:07:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52542 states to 52542 states and 58722 transitions. [2021-12-17 05:07:56,865 INFO L78 Accepts]: Start accepts. Automaton has 52542 states and 58722 transitions. Word has length 658 [2021-12-17 05:07:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:56,866 INFO L470 AbstractCegarLoop]: Abstraction has 52542 states and 58722 transitions. [2021-12-17 05:07:56,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 05:07:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52542 states and 58722 transitions. [2021-12-17 05:07:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2021-12-17 05:07:57,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:07:57,002 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:57,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 05:07:57,002 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:07:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:07:57,003 INFO L85 PathProgramCache]: Analyzing trace with hash 552670037, now seen corresponding path program 1 times [2021-12-17 05:07:57,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:07:57,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455171122] [2021-12-17 05:07:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:07:57,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:07:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:07:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 816 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-17 05:07:57,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:07:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455171122] [2021-12-17 05:07:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455171122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:07:57,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:07:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:07:57,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071460017] [2021-12-17 05:07:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:07:57,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:07:57,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:07:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:07:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:07:57,247 INFO L87 Difference]: Start difference. First operand 52542 states and 58722 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 05:07:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:07:58,966 INFO L93 Difference]: Finished difference Result 122951 states and 137590 transitions. [2021-12-17 05:07:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:07:58,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 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 715 [2021-12-17 05:07:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:07:59,041 INFO L225 Difference]: With dead ends: 122951 [2021-12-17 05:07:59,041 INFO L226 Difference]: Without dead ends: 70836 [2021-12-17 05:07:59,081 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 05:07:59,082 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 388 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:07:59,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 260 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 05:07:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70836 states. [2021-12-17 05:07:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70836 to 68278. [2021-12-17 05:07:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68278 states, 68277 states have (on average 1.110886535729455) internal successors, (75848), 68277 states have internal predecessors, (75848), 0 states have call successors, (0), 0 states 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 05:07:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68278 states to 68278 states and 75848 transitions. [2021-12-17 05:07:59,895 INFO L78 Accepts]: Start accepts. Automaton has 68278 states and 75848 transitions. Word has length 715 [2021-12-17 05:07:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:07:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 68278 states and 75848 transitions. [2021-12-17 05:07:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 05:07:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 68278 states and 75848 transitions. [2021-12-17 05:08:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-12-17 05:08:00,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:00,102 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:00,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 05:08:00,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash 866795984, now seen corresponding path program 1 times [2021-12-17 05:08:00,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732953307] [2021-12-17 05:08:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:00,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 925 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-17 05:08:00,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:00,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732953307] [2021-12-17 05:08:00,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732953307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:00,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:00,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:08:00,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102564561] [2021-12-17 05:08:00,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:00,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:08:00,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:08:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:00,366 INFO L87 Difference]: Start difference. First operand 68278 states and 75848 transitions. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 05:08:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:03,178 INFO L93 Difference]: Finished difference Result 170654 states and 189275 transitions. [2021-12-17 05:08:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:08:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 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 737 [2021-12-17 05:08:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:03,297 INFO L225 Difference]: With dead ends: 170654 [2021-12-17 05:08:03,298 INFO L226 Difference]: Without dead ends: 102803 [2021-12-17 05:08:03,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:03,339 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 779 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:03,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 175 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 05:08:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102803 states. [2021-12-17 05:08:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102803 to 101095. [2021-12-17 05:08:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101095 states, 101094 states have (on average 1.1035274101331434) internal successors, (111560), 101094 states have internal predecessors, (111560), 0 states have call successors, (0), 0 states 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 05:08:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101095 states to 101095 states and 111560 transitions. [2021-12-17 05:08:04,648 INFO L78 Accepts]: Start accepts. Automaton has 101095 states and 111560 transitions. Word has length 737 [2021-12-17 05:08:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:04,648 INFO L470 AbstractCegarLoop]: Abstraction has 101095 states and 111560 transitions. [2021-12-17 05:08:04,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 05:08:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 101095 states and 111560 transitions. [2021-12-17 05:08:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2021-12-17 05:08:04,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:04,892 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:04,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 05:08:04,894 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1693827810, now seen corresponding path program 1 times [2021-12-17 05:08:04,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:04,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073995808] [2021-12-17 05:08:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:04,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 847 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 05:08:05,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:05,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073995808] [2021-12-17 05:08:05,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073995808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:05,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:05,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:08:05,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974509934] [2021-12-17 05:08:05,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:05,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:08:05,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:08:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:05,224 INFO L87 Difference]: Start difference. First operand 101095 states and 111560 transitions. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 05:08:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:08,322 INFO L93 Difference]: Finished difference Result 211540 states and 232906 transitions. [2021-12-17 05:08:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:08:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 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 808 [2021-12-17 05:08:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:08,454 INFO L225 Difference]: With dead ends: 211540 [2021-12-17 05:08:08,454 INFO L226 Difference]: Without dead ends: 110870 [2021-12-17 05:08:08,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:08,512 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 619 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:08,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 371 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 05:08:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110870 states. [2021-12-17 05:08:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110870 to 104485. [2021-12-17 05:08:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104485 states, 104484 states have (on average 1.0911239998468665) internal successors, (114005), 104484 states have internal predecessors, (114005), 0 states have call successors, (0), 0 states 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 05:08:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104485 states to 104485 states and 114005 transitions. [2021-12-17 05:08:10,000 INFO L78 Accepts]: Start accepts. Automaton has 104485 states and 114005 transitions. Word has length 808 [2021-12-17 05:08:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:10,001 INFO L470 AbstractCegarLoop]: Abstraction has 104485 states and 114005 transitions. [2021-12-17 05:08:10,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 05:08:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 104485 states and 114005 transitions. [2021-12-17 05:08:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2021-12-17 05:08:10,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:10,036 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:10,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 05:08:10,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1240563854, now seen corresponding path program 1 times [2021-12-17 05:08:10,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:10,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638849864] [2021-12-17 05:08:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:10,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 728 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-12-17 05:08:10,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638849864] [2021-12-17 05:08:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638849864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:10,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:08:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410266292] [2021-12-17 05:08:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:08:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:08:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:08:10,232 INFO L87 Difference]: Start difference. First operand 104485 states and 114005 transitions. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 05:08:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:12,292 INFO L93 Difference]: Finished difference Result 215345 states and 234646 transitions. [2021-12-17 05:08:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:08:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 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 809 [2021-12-17 05:08:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:12,419 INFO L225 Difference]: With dead ends: 215345 [2021-12-17 05:08:12,419 INFO L226 Difference]: Without dead ends: 111287 [2021-12-17 05:08:12,480 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 05:08:12,481 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 508 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:12,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 204 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:08:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111287 states. [2021-12-17 05:08:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111287 to 104473. [2021-12-17 05:08:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104473 states, 104472 states have (on average 1.0822708476912475) internal successors, (113067), 104472 states have internal predecessors, (113067), 0 states have call successors, (0), 0 states 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 05:08:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104473 states to 104473 states and 113067 transitions. [2021-12-17 05:08:13,931 INFO L78 Accepts]: Start accepts. Automaton has 104473 states and 113067 transitions. Word has length 809 [2021-12-17 05:08:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:13,932 INFO L470 AbstractCegarLoop]: Abstraction has 104473 states and 113067 transitions. [2021-12-17 05:08:13,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 05:08:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 104473 states and 113067 transitions. [2021-12-17 05:08:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2021-12-17 05:08:13,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:13,967 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:13,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 05:08:13,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash 559040166, now seen corresponding path program 1 times [2021-12-17 05:08:13,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:13,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988691790] [2021-12-17 05:08:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:13,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 909 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-17 05:08:14,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:14,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988691790] [2021-12-17 05:08:14,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988691790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:14,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:14,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:08:14,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417730304] [2021-12-17 05:08:14,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:14,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:08:14,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:08:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:14,563 INFO L87 Difference]: Start difference. First operand 104473 states and 113067 transitions. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 05:08:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:17,645 INFO L93 Difference]: Finished difference Result 240465 states and 259841 transitions. [2021-12-17 05:08:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:08:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 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 828 [2021-12-17 05:08:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:17,802 INFO L225 Difference]: With dead ends: 240465 [2021-12-17 05:08:17,802 INFO L226 Difference]: Without dead ends: 135994 [2021-12-17 05:08:17,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:17,860 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 474 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 182 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 05:08:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135994 states. [2021-12-17 05:08:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135994 to 128762. [2021-12-17 05:08:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128762 states, 128761 states have (on average 1.076832270640955) internal successors, (138654), 128761 states have internal predecessors, (138654), 0 states have call successors, (0), 0 states 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 05:08:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128762 states to 128762 states and 138654 transitions. [2021-12-17 05:08:19,476 INFO L78 Accepts]: Start accepts. Automaton has 128762 states and 138654 transitions. Word has length 828 [2021-12-17 05:08:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 128762 states and 138654 transitions. [2021-12-17 05:08:19,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 05:08:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 128762 states and 138654 transitions. [2021-12-17 05:08:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2021-12-17 05:08:19,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:19,514 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:19,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 05:08:19,514 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 275307038, now seen corresponding path program 1 times [2021-12-17 05:08:19,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:19,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546093215] [2021-12-17 05:08:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:19,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 919 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-17 05:08:19,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546093215] [2021-12-17 05:08:19,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546093215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:19,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:19,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:08:19,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205388901] [2021-12-17 05:08:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:19,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:08:19,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:08:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:19,800 INFO L87 Difference]: Start difference. First operand 128762 states and 138654 transitions. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 05:08:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:23,087 INFO L93 Difference]: Finished difference Result 286487 states and 308188 transitions. [2021-12-17 05:08:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:08:23,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 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 833 [2021-12-17 05:08:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:23,276 INFO L225 Difference]: With dead ends: 286487 [2021-12-17 05:08:23,276 INFO L226 Difference]: Without dead ends: 157727 [2021-12-17 05:08:23,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:08:23,352 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 494 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:23,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 169 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 05:08:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157727 states. [2021-12-17 05:08:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157727 to 129612. [2021-12-17 05:08:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129612 states, 129611 states have (on average 1.0771770914505714) internal successors, (139614), 129611 states have internal predecessors, (139614), 0 states have call successors, (0), 0 states 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 05:08:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129612 states to 129612 states and 139614 transitions. [2021-12-17 05:08:25,267 INFO L78 Accepts]: Start accepts. Automaton has 129612 states and 139614 transitions. Word has length 833 [2021-12-17 05:08:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:25,267 INFO L470 AbstractCegarLoop]: Abstraction has 129612 states and 139614 transitions. [2021-12-17 05:08:25,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 05:08:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand 129612 states and 139614 transitions. [2021-12-17 05:08:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2021-12-17 05:08:25,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:25,321 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2021-12-17 05:08:25,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 05:08:25,322 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2057003843, now seen corresponding path program 1 times [2021-12-17 05:08:25,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:25,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830306305] [2021-12-17 05:08:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:25,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1636 backedges. 1086 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-17 05:08:25,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:25,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830306305] [2021-12-17 05:08:25,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830306305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:25,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:25,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 05:08:25,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780198463] [2021-12-17 05:08:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:25,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 05:08:25,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 05:08:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:08:25,599 INFO L87 Difference]: Start difference. First operand 129612 states and 139614 transitions. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 05:08:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:29,351 INFO L93 Difference]: Finished difference Result 302258 states and 325109 transitions. [2021-12-17 05:08:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 05:08:29,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 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 907 [2021-12-17 05:08:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:29,542 INFO L225 Difference]: With dead ends: 302258 [2021-12-17 05:08:29,542 INFO L226 Difference]: Without dead ends: 173073 [2021-12-17 05:08:29,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:08:29,619 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1017 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:29,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 286 Invalid, 4219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 05:08:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173073 states. [2021-12-17 05:08:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173073 to 159018. [2021-12-17 05:08:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159018 states, 159017 states have (on average 1.0703698346717647) internal successors, (170207), 159017 states have internal predecessors, (170207), 0 states have call successors, (0), 0 states 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 05:08:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159018 states to 159018 states and 170207 transitions. [2021-12-17 05:08:32,265 INFO L78 Accepts]: Start accepts. Automaton has 159018 states and 170207 transitions. Word has length 907 [2021-12-17 05:08:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 159018 states and 170207 transitions. [2021-12-17 05:08:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 05:08:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 159018 states and 170207 transitions. [2021-12-17 05:08:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2021-12-17 05:08:32,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:32,327 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2021-12-17 05:08:32,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 05:08:32,327 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 83761147, now seen corresponding path program 1 times [2021-12-17 05:08:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427436194] [2021-12-17 05:08:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:32,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1636 backedges. 1086 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-17 05:08:32,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427436194] [2021-12-17 05:08:32,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427436194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:32,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:32,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 05:08:32,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22956275] [2021-12-17 05:08:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:32,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 05:08:32,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 05:08:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:08:32,600 INFO L87 Difference]: Start difference. First operand 159018 states and 170207 transitions. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 05:08:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:36,449 INFO L93 Difference]: Finished difference Result 370441 states and 396928 transitions. [2021-12-17 05:08:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 05:08:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 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 907 [2021-12-17 05:08:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:36,709 INFO L225 Difference]: With dead ends: 370441 [2021-12-17 05:08:36,709 INFO L226 Difference]: Without dead ends: 211425 [2021-12-17 05:08:36,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:08:36,802 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1112 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:36,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 220 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 3250 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 05:08:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211425 states. [2021-12-17 05:08:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211425 to 164116. [2021-12-17 05:08:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164116 states, 164115 states have (on average 1.070383572494897) internal successors, (175666), 164115 states have internal predecessors, (175666), 0 states have call successors, (0), 0 states 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 05:08:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164116 states to 164116 states and 175666 transitions. [2021-12-17 05:08:39,304 INFO L78 Accepts]: Start accepts. Automaton has 164116 states and 175666 transitions. Word has length 907 [2021-12-17 05:08:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:08:39,305 INFO L470 AbstractCegarLoop]: Abstraction has 164116 states and 175666 transitions. [2021-12-17 05:08:39,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 05:08:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 164116 states and 175666 transitions. [2021-12-17 05:08:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2021-12-17 05:08:39,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:08:39,834 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:08:39,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 05:08:39,835 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:08:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:08:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash -763646407, now seen corresponding path program 1 times [2021-12-17 05:08:39,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:08:39,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088612103] [2021-12-17 05:08:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:08:39,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:08:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:08:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 969 proven. 0 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-12-17 05:08:40,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:08:40,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088612103] [2021-12-17 05:08:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088612103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:08:40,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:08:40,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:08:40,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551545663] [2021-12-17 05:08:40,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:08:40,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:08:40,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:08:40,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:08:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:08:40,061 INFO L87 Difference]: Start difference. First operand 164116 states and 175666 transitions. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 2 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 05:08:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:08:41,898 INFO L93 Difference]: Finished difference Result 324382 states and 347050 transitions. [2021-12-17 05:08:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:08:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 2 states have internal predecessors, (530), 0 states have call successors, (0), 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 938 [2021-12-17 05:08:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:08:42,106 INFO L225 Difference]: With dead ends: 324382 [2021-12-17 05:08:42,106 INFO L226 Difference]: Without dead ends: 160693 [2021-12-17 05:08:42,190 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 05:08:42,195 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 487 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:08:42,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 85 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 05:08:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160693 states.