./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label08.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 6974994fa41c2218950105a3f2a905efa9ed2213c945e8187ea9622e98b47d24 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:37:54,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:37:54,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:37:54,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:37:54,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:37:54,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:37:54,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:37:54,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:37:54,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:37:54,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:37:54,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:37:54,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:37:54,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:37:54,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:37:54,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:37:54,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:37:54,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:37:54,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:37:54,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:37:54,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:37:54,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:37:54,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:37:54,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:37:54,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:37:54,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:37:54,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:37:54,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:37:54,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:37:54,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:37:54,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:37:54,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:37:54,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:37:54,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:37:54,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:37:54,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:37:54,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:37:54,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:37:54,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:37:54,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:37:54,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:37:54,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:37:54,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:37:54,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:37:54,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:37:54,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:37:54,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:37:54,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:37:54,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:37:54,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:37:54,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:37:54,331 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:37:54,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:37:54,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:37:54,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:37:54,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:37:54,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:37:54,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:37:54,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:37:54,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:37:54,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:37:54,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:37:54,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:37:54,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:37:54,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:37:54,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:37:54,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:37:54,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:37:54,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:37:54,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:37:54,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:37:54,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6974994fa41c2218950105a3f2a905efa9ed2213c945e8187ea9622e98b47d24 [2021-12-15 09:37:54,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:37:54,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:37:54,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:37:54,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:37:54,537 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:37:54,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label08.c [2021-12-15 09:37:54,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59720c3fc/4def4c5b0b5c4b7f8174511694287a00/FLAG90c004b9d [2021-12-15 09:37:55,159 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:37:55,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label08.c [2021-12-15 09:37:55,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59720c3fc/4def4c5b0b5c4b7f8174511694287a00/FLAG90c004b9d [2021-12-15 09:37:55,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59720c3fc/4def4c5b0b5c4b7f8174511694287a00 [2021-12-15 09:37:55,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:37:55,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:37:55,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:37:55,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:37:55,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:37:55,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:37:55" (1/1) ... [2021-12-15 09:37:55,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2167f3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:55, skipping insertion in model container [2021-12-15 09:37:55,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:37:55" (1/1) ... [2021-12-15 09:37:55,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:37:55,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:37:55,916 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/Problem12_label08.c[3868,3881] [2021-12-15 09:37:56,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:37:56,467 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:37:56,478 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/Problem12_label08.c[3868,3881] [2021-12-15 09:37:56,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:37:56,808 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:37:56,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56 WrapperNode [2021-12-15 09:37:56,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:37:56,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:37:56,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:37:56,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:37:56,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:56,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,145 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:37:57,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:37:57,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:37:57,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:37:57,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:37:57,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:37:57,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:37:57,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:37:57,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:37:57,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (1/1) ... [2021-12-15 09:37:57,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:37:57,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:37:57,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:37:57,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:37:57,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:37:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:37:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:37:57,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:37:57,786 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:37:57,787 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:38:00,365 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:38:00,381 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:38:00,381 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:38:00,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:38:00 BoogieIcfgContainer [2021-12-15 09:38:00,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:38:00,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:38:00,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:38:00,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:38:00,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:37:55" (1/3) ... [2021-12-15 09:38:00,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f007f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:38:00, skipping insertion in model container [2021-12-15 09:38:00,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:56" (2/3) ... [2021-12-15 09:38:00,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f007f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:38:00, skipping insertion in model container [2021-12-15 09:38:00,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:38:00" (3/3) ... [2021-12-15 09:38:00,393 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label08.c [2021-12-15 09:38:00,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:38:00,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:38:00,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:38:00,436 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:38:00,436 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:38:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 09:38:00,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:00,459 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] [2021-12-15 09:38:00,459 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:00,463 INFO L85 PathProgramCache]: Analyzing trace with hash -748286455, now seen corresponding path program 1 times [2021-12-15 09:38:00,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:00,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760045700] [2021-12-15 09:38:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:00,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:00,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760045700] [2021-12-15 09:38:00,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760045700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:00,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:00,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:38:00,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891162291] [2021-12-15 09:38:00,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:00,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:00,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:00,622 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:03,330 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-15 09:38:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-15 09:38:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:03,349 INFO L225 Difference]: With dead ends: 2388 [2021-12-15 09:38:03,349 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:38:03,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:03,357 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 805 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:03,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:38:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:38:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:38:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-12-15 09:38:03,433 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 29 [2021-12-15 09:38:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:03,433 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-12-15 09:38:03,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-12-15 09:38:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-15 09:38:03,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:03,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:03,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:38:03,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1584011205, now seen corresponding path program 1 times [2021-12-15 09:38:03,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:03,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301525518] [2021-12-15 09:38:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:03,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:38:03,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301525518] [2021-12-15 09:38:03,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301525518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:03,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:03,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:38:03,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247130363] [2021-12-15 09:38:03,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:03,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:03,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:03,554 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:06,129 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2021-12-15 09:38:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 100 [2021-12-15 09:38:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:06,147 INFO L225 Difference]: With dead ends: 4512 [2021-12-15 09:38:06,148 INFO L226 Difference]: Without dead ends: 3008 [2021-12-15 09:38:06,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:06,154 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 726 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:06,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 475 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:38:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-15 09:38:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-15 09:38:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4253408713002993) internal successors, (4286), 3007 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4286 transitions. [2021-12-15 09:38:06,201 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4286 transitions. Word has length 100 [2021-12-15 09:38:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:06,204 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4286 transitions. [2021-12-15 09:38:06,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4286 transitions. [2021-12-15 09:38:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 09:38:06,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:06,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:06,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:38:06,215 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash 656790149, now seen corresponding path program 1 times [2021-12-15 09:38:06,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:06,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183435666] [2021-12-15 09:38:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:06,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:06,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:06,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183435666] [2021-12-15 09:38:06,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183435666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:06,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:06,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:06,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196471235] [2021-12-15 09:38:06,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:06,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:38:06,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:38:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:38:06,372 INFO L87 Difference]: Start difference. First operand 3008 states and 4286 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 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) [2021-12-15 09:38:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:08,704 INFO L93 Difference]: Finished difference Result 6781 states and 9427 transitions. [2021-12-15 09:38:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:38:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 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 104 [2021-12-15 09:38:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:08,715 INFO L225 Difference]: With dead ends: 6781 [2021-12-15 09:38:08,715 INFO L226 Difference]: Without dead ends: 3775 [2021-12-15 09:38:08,718 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 [2021-12-15 09:38:08,719 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:08,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:38:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-12-15 09:38:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3759. [2021-12-15 09:38:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3419372006386376) internal successors, (5043), 3758 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5043 transitions. [2021-12-15 09:38:08,776 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5043 transitions. Word has length 104 [2021-12-15 09:38:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:08,776 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5043 transitions. [2021-12-15 09:38:08,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 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) [2021-12-15 09:38:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5043 transitions. [2021-12-15 09:38:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-15 09:38:08,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:08,779 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:08,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:38:08,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1832872685, now seen corresponding path program 1 times [2021-12-15 09:38:08,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797436612] [2021-12-15 09:38:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:08,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:08,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797436612] [2021-12-15 09:38:08,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797436612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:08,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:08,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:08,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185780702] [2021-12-15 09:38:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:08,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:38:08,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:38:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:38:08,941 INFO L87 Difference]: Start difference. First operand 3759 states and 5043 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:11,506 INFO L93 Difference]: Finished difference Result 8304 states and 11184 transitions. [2021-12-15 09:38:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:38:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2021-12-15 09:38:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:11,520 INFO L225 Difference]: With dead ends: 8304 [2021-12-15 09:38:11,520 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 09:38:11,523 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 [2021-12-15 09:38:11,524 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:11,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:38:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 09:38:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 09:38:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2543726235741446) internal successors, (6598), 5260 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6598 transitions. [2021-12-15 09:38:11,587 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6598 transitions. Word has length 175 [2021-12-15 09:38:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6598 transitions. [2021-12-15 09:38:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6598 transitions. [2021-12-15 09:38:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 09:38:11,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:11,590 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:11,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:38:11,591 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash 414176474, now seen corresponding path program 1 times [2021-12-15 09:38:11,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584125631] [2021-12-15 09:38:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:11,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:38:11,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584125631] [2021-12-15 09:38:11,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584125631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:11,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:11,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:11,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171100340] [2021-12-15 09:38:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:11,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:11,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:11,688 INFO L87 Difference]: Start difference. First operand 5261 states and 6598 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:14,025 INFO L93 Difference]: Finished difference Result 11271 states and 14840 transitions. [2021-12-15 09:38:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 241 [2021-12-15 09:38:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:14,044 INFO L225 Difference]: With dead ends: 11271 [2021-12-15 09:38:14,045 INFO L226 Difference]: Without dead ends: 6763 [2021-12-15 09:38:14,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:14,052 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 755 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:14,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 525 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:38:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-12-15 09:38:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5261. [2021-12-15 09:38:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2543726235741446) internal successors, (6598), 5260 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6598 transitions. [2021-12-15 09:38:14,164 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6598 transitions. Word has length 241 [2021-12-15 09:38:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6598 transitions. [2021-12-15 09:38:14,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6598 transitions. [2021-12-15 09:38:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-15 09:38:14,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:14,170 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:14,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:38:14,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1767025089, now seen corresponding path program 1 times [2021-12-15 09:38:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:14,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809967551] [2021-12-15 09:38:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:14,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:14,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:14,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809967551] [2021-12-15 09:38:14,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809967551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:14,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:14,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:14,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600327089] [2021-12-15 09:38:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:14,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:14,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:14,277 INFO L87 Difference]: Start difference. First operand 5261 states and 6598 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:16,745 INFO L93 Difference]: Finished difference Result 14275 states and 18277 transitions. [2021-12-15 09:38:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-12-15 09:38:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:16,769 INFO L225 Difference]: With dead ends: 14275 [2021-12-15 09:38:16,770 INFO L226 Difference]: Without dead ends: 9767 [2021-12-15 09:38:16,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:16,777 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 685 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1248 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:38:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-15 09:38:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-15 09:38:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2334630350194553) internal successors, (12046), 9766 states have internal predecessors, (12046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12046 transitions. [2021-12-15 09:38:16,900 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12046 transitions. Word has length 242 [2021-12-15 09:38:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:16,900 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12046 transitions. [2021-12-15 09:38:16,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12046 transitions. [2021-12-15 09:38:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-15 09:38:16,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:16,903 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:16,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:38:16,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2134249466, now seen corresponding path program 1 times [2021-12-15 09:38:16,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:16,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755921130] [2021-12-15 09:38:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:16,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:38:17,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755921130] [2021-12-15 09:38:17,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755921130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:17,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:17,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:38:17,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116522717] [2021-12-15 09:38:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:17,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:17,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:17,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:17,012 INFO L87 Difference]: Start difference. First operand 9767 states and 12046 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:19,279 INFO L93 Difference]: Finished difference Result 27042 states and 33826 transitions. [2021-12-15 09:38:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-15 09:38:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:19,311 INFO L225 Difference]: With dead ends: 27042 [2021-12-15 09:38:19,311 INFO L226 Difference]: Without dead ends: 18028 [2021-12-15 09:38:19,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:19,322 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:19,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:38:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-12-15 09:38:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 15775. [2021-12-15 09:38:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.191264105490047) internal successors, (18791), 15774 states have internal predecessors, (18791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 18791 transitions. [2021-12-15 09:38:19,496 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 18791 transitions. Word has length 244 [2021-12-15 09:38:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 18791 transitions. [2021-12-15 09:38:19,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 18791 transitions. [2021-12-15 09:38:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-15 09:38:19,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:19,499 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:38:19,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1879564811, now seen corresponding path program 1 times [2021-12-15 09:38:19,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:19,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793362598] [2021-12-15 09:38:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:19,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:19,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:19,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793362598] [2021-12-15 09:38:19,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793362598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:19,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103914083] [2021-12-15 09:38:19,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:19,588 INFO L87 Difference]: Start difference. First operand 15775 states and 18791 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:22,063 INFO L93 Difference]: Finished difference Result 38307 states and 46115 transitions. [2021-12-15 09:38:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 246 [2021-12-15 09:38:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:22,107 INFO L225 Difference]: With dead ends: 38307 [2021-12-15 09:38:22,108 INFO L226 Difference]: Without dead ends: 23285 [2021-12-15 09:38:22,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:22,124 INFO L933 BasicCegarLoop]: 1085 mSDtfsCounter, 711 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2359 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:22,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1092 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2359 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:38:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23285 states. [2021-12-15 09:38:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23285 to 23285. [2021-12-15 09:38:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.1843755368493385) internal successors, (27577), 23284 states have internal predecessors, (27577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 27577 transitions. [2021-12-15 09:38:22,340 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 27577 transitions. Word has length 246 [2021-12-15 09:38:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:22,341 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 27577 transitions. [2021-12-15 09:38:22,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 27577 transitions. [2021-12-15 09:38:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-15 09:38:22,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:22,344 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:22,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:38:22,344 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1320617837, now seen corresponding path program 1 times [2021-12-15 09:38:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:22,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873464194] [2021-12-15 09:38:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:22,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:38:22,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873464194] [2021-12-15 09:38:22,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873464194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:22,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:22,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:22,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941807647] [2021-12-15 09:38:22,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:22,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:22,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:22,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:22,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:22,413 INFO L87 Difference]: Start difference. First operand 23285 states and 27577 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:24,906 INFO L93 Difference]: Finished difference Result 54829 states and 66321 transitions. [2021-12-15 09:38:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 259 [2021-12-15 09:38:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:24,958 INFO L225 Difference]: With dead ends: 54829 [2021-12-15 09:38:24,958 INFO L226 Difference]: Without dead ends: 32297 [2021-12-15 09:38:24,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:24,981 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 784 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:24,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 322 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 2205 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:38:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32297 states. [2021-12-15 09:38:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32297 to 32297. [2021-12-15 09:38:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32297 states, 32296 states have (on average 1.188413425811246) internal successors, (38381), 32296 states have internal predecessors, (38381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32297 states to 32297 states and 38381 transitions. [2021-12-15 09:38:25,294 INFO L78 Accepts]: Start accepts. Automaton has 32297 states and 38381 transitions. Word has length 259 [2021-12-15 09:38:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:25,295 INFO L470 AbstractCegarLoop]: Abstraction has 32297 states and 38381 transitions. [2021-12-15 09:38:25,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 32297 states and 38381 transitions. [2021-12-15 09:38:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-15 09:38:25,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:25,298 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:25,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:38:25,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1937165778, now seen corresponding path program 1 times [2021-12-15 09:38:25,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:25,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286746250] [2021-12-15 09:38:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:25,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-15 09:38:25,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286746250] [2021-12-15 09:38:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286746250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:25,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:25,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:38:25,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98837094] [2021-12-15 09:38:25,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:25,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:25,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:25,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:25,363 INFO L87 Difference]: Start difference. First operand 32297 states and 38381 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:27,808 INFO L93 Difference]: Finished difference Result 88626 states and 106438 transitions. [2021-12-15 09:38:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 260 [2021-12-15 09:38:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:27,879 INFO L225 Difference]: With dead ends: 88626 [2021-12-15 09:38:27,879 INFO L226 Difference]: Without dead ends: 57082 [2021-12-15 09:38:27,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:27,907 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:27,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:38:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57082 states. [2021-12-15 09:38:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57082 to 53325. [2021-12-15 09:38:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53325 states, 53324 states have (on average 1.1626847198259695) internal successors, (61999), 53324 states have internal predecessors, (61999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 61999 transitions. [2021-12-15 09:38:28,505 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 61999 transitions. Word has length 260 [2021-12-15 09:38:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:28,506 INFO L470 AbstractCegarLoop]: Abstraction has 53325 states and 61999 transitions. [2021-12-15 09:38:28,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 61999 transitions. [2021-12-15 09:38:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 09:38:28,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:28,508 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:28,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:38:28,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1110363551, now seen corresponding path program 1 times [2021-12-15 09:38:28,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:28,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442163293] [2021-12-15 09:38:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:28,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-15 09:38:28,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:28,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442163293] [2021-12-15 09:38:28,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442163293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:28,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:28,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:28,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725183458] [2021-12-15 09:38:28,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:28,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:28,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:28,595 INFO L87 Difference]: Start difference. First operand 53325 states and 61999 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:31,279 INFO L93 Difference]: Finished difference Result 105897 states and 123240 transitions. [2021-12-15 09:38:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 306 [2021-12-15 09:38:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:31,350 INFO L225 Difference]: With dead ends: 105897 [2021-12-15 09:38:31,351 INFO L226 Difference]: Without dead ends: 53325 [2021-12-15 09:38:31,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:31,380 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 764 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:31,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 200 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:38:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53325 states. [2021-12-15 09:38:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53325 to 51823. [2021-12-15 09:38:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51823 states, 51822 states have (on average 1.1579637991586584) internal successors, (60008), 51822 states have internal predecessors, (60008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51823 states to 51823 states and 60008 transitions. [2021-12-15 09:38:31,992 INFO L78 Accepts]: Start accepts. Automaton has 51823 states and 60008 transitions. Word has length 306 [2021-12-15 09:38:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:31,992 INFO L470 AbstractCegarLoop]: Abstraction has 51823 states and 60008 transitions. [2021-12-15 09:38:31,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51823 states and 60008 transitions. [2021-12-15 09:38:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-15 09:38:31,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:31,997 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:31,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:38:31,997 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1566716866, now seen corresponding path program 1 times [2021-12-15 09:38:31,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116568986] [2021-12-15 09:38:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:31,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-15 09:38:32,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116568986] [2021-12-15 09:38:32,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116568986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:32,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:32,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:32,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659244403] [2021-12-15 09:38:32,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:32,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:32,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:32,084 INFO L87 Difference]: Start difference. First operand 51823 states and 60008 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:34,724 INFO L93 Difference]: Finished difference Result 130680 states and 153271 transitions. [2021-12-15 09:38:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 380 [2021-12-15 09:38:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:34,815 INFO L225 Difference]: With dead ends: 130680 [2021-12-15 09:38:34,815 INFO L226 Difference]: Without dead ends: 79610 [2021-12-15 09:38:34,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:34,850 INFO L933 BasicCegarLoop]: 1238 mSDtfsCounter, 680 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:34,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 1246 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:38:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79610 states. [2021-12-15 09:38:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79610 to 79610. [2021-12-15 09:38:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79610 states, 79609 states have (on average 1.1277870592520947) internal successors, (89782), 79609 states have internal predecessors, (89782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 89782 transitions. [2021-12-15 09:38:35,666 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 89782 transitions. Word has length 380 [2021-12-15 09:38:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:35,667 INFO L470 AbstractCegarLoop]: Abstraction has 79610 states and 89782 transitions. [2021-12-15 09:38:35,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 89782 transitions. [2021-12-15 09:38:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-12-15 09:38:35,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:35,671 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:35,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:38:35,672 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2101682232, now seen corresponding path program 1 times [2021-12-15 09:38:35,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025810611] [2021-12-15 09:38:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:35,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:38:36,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025810611] [2021-12-15 09:38:36,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025810611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:36,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:36,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:36,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352848719] [2021-12-15 09:38:36,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:36,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:36,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:36,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:36,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:36,009 INFO L87 Difference]: Start difference. First operand 79610 states and 89782 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:38,899 INFO L93 Difference]: Finished difference Result 181748 states and 207585 transitions. [2021-12-15 09:38:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:38,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 384 [2021-12-15 09:38:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:39,045 INFO L225 Difference]: With dead ends: 181748 [2021-12-15 09:38:39,046 INFO L226 Difference]: Without dead ends: 102891 [2021-12-15 09:38:39,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:39,084 INFO L933 BasicCegarLoop]: 1288 mSDtfsCounter, 673 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:39,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1296 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:38:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2021-12-15 09:38:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 101389. [2021-12-15 09:38:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101389 states, 101388 states have (on average 1.1115911153193672) internal successors, (112702), 101388 states have internal predecessors, (112702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101389 states to 101389 states and 112702 transitions. [2021-12-15 09:38:40,474 INFO L78 Accepts]: Start accepts. Automaton has 101389 states and 112702 transitions. Word has length 384 [2021-12-15 09:38:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:40,475 INFO L470 AbstractCegarLoop]: Abstraction has 101389 states and 112702 transitions. [2021-12-15 09:38:40,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 101389 states and 112702 transitions. [2021-12-15 09:38:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-15 09:38:40,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:40,479 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:40,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:38:40,480 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 865480578, now seen corresponding path program 1 times [2021-12-15 09:38:40,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:40,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302554550] [2021-12-15 09:38:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:40,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 338 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:40,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302554550] [2021-12-15 09:38:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302554550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:38:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120550981] [2021-12-15 09:38:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:40,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:38:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:38:40,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:38:40,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:38:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:38:40,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:38:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 246 proven. 27 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:38:41,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:38:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 246 proven. 27 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:38:41,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120550981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:38:41,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:38:41,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-12-15 09:38:41,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670272984] [2021-12-15 09:38:41,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:38:41,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 09:38:41,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 09:38:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:38:41,952 INFO L87 Difference]: Start difference. First operand 101389 states and 112702 transitions. Second operand has 10 states, 10 states have (on average 78.3) internal successors, (783), 10 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)