./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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 6c42bca5197a9d3789842b36ec154209e56c2a7008fcac4a7338bcb4050288a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:39:36,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:39:36,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:39:36,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:39:36,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:39:36,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:39:36,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:39:36,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:39:36,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:39:36,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:39:36,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:39:36,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:39:36,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:39:36,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:39:36,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:39:36,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:39:36,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:39:36,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:39:36,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:39:36,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:39:36,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:39:36,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:39:36,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:39:36,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:39:36,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:39:36,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:39:36,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:39:36,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:39:36,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:39:36,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:39:36,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:39:36,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:39:36,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:39:36,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:39:36,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:39:36,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:39:36,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:39:36,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:39:36,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:39:36,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:39:36,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:39:36,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:39:36,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:39:36,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:39:36,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:39:36,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:39:36,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:39:36,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:39:36,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:39:36,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:39:36,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:39:36,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:39:36,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:39:36,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:39:36,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:39:36,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:39:36,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:39:36,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:39:36,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:39:36,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:39:36,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:39:36,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:39:36,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:39:36,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:39:36,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:39:36,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:39:36,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:39:36,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:39:36,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:39:36,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:39:36,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:39:36,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:39:36,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:39:36,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:39:36,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:39:36,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:39:36,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c42bca5197a9d3789842b36ec154209e56c2a7008fcac4a7338bcb4050288a1 [2021-12-21 13:39:36,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:39:36,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:39:36,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:39:36,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:39:36,646 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:39:36,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:39:36,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/853b0ca3b/116cbdc35aaf4a81a2071c5aaa8794c3/FLAG28dfa7812 [2021-12-21 13:39:37,177 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:39:37,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:39:37,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/853b0ca3b/116cbdc35aaf4a81a2071c5aaa8794c3/FLAG28dfa7812 [2021-12-21 13:39:37,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/853b0ca3b/116cbdc35aaf4a81a2071c5aaa8794c3 [2021-12-21 13:39:37,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:39:37,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:39:37,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:39:37,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:39:37,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:39:37,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:39:37" (1/1) ... [2021-12-21 13:39:37,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d883e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:37, skipping insertion in model container [2021-12-21 13:39:37,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:39:37" (1/1) ... [2021-12-21 13:39:37,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:39:37,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:39:37,892 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/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2021-12-21 13:39:37,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:39:37,977 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:39:38,173 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/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2021-12-21 13:39:38,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:39:38,260 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:39:38,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38 WrapperNode [2021-12-21 13:39:38,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:39:38,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:39:38,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:39:38,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:39:38,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,351 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2217 [2021-12-21 13:39:38,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:39:38,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:39:38,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:39:38,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:39:38,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:39:38,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:39:38,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:39:38,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:39:38,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (1/1) ... [2021-12-21 13:39:38,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:39:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:39:38,477 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) [2021-12-21 13:39:38,486 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 [2021-12-21 13:39:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:39:38,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:39:38,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:39:38,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:39:38,603 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:39:38,604 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:39:39,582 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:39:39,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:39:39,593 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:39:39,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:39:39 BoogieIcfgContainer [2021-12-21 13:39:39,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:39:39,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:39:39,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:39:39,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:39:39,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:39:37" (1/3) ... [2021-12-21 13:39:39,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e377dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:39:39, skipping insertion in model container [2021-12-21 13:39:39,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:39:38" (2/3) ... [2021-12-21 13:39:39,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e377dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:39:39, skipping insertion in model container [2021-12-21 13:39:39,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:39:39" (3/3) ... [2021-12-21 13:39:39,603 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:39:39,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:39:39,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:39:39,641 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:39:39,645 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 [2021-12-21 13:39:39,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:39:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 592 states, 590 states have (on average 1.7881355932203389) internal successors, (1055), 591 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-21 13:39:39,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:39,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:39,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash 888634146, now seen corresponding path program 1 times [2021-12-21 13:39:39,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:39,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385725929] [2021-12-21 13:39:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:39,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:40,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385725929] [2021-12-21 13:39:40,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385725929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:40,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:40,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:40,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535096887] [2021-12-21 13:39:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:40,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:40,275 INFO L87 Difference]: Start difference. First operand has 592 states, 590 states have (on average 1.7881355932203389) internal successors, (1055), 591 states have internal predecessors, (1055), 0 states have call successors, (0), 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 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:40,429 INFO L93 Difference]: Finished difference Result 1084 states and 1917 transitions. [2021-12-21 13:39:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-12-21 13:39:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:40,443 INFO L225 Difference]: With dead ends: 1084 [2021-12-21 13:39:40,443 INFO L226 Difference]: Without dead ends: 901 [2021-12-21 13:39:40,450 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 [2021-12-21 13:39:40,452 INFO L933 BasicCegarLoop]: 1009 mSDtfsCounter, 593 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:40,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1833 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:39:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-12-21 13:39:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 899. [2021-12-21 13:39:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.5701559020044544) internal successors, (1410), 898 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1410 transitions. [2021-12-21 13:39:40,524 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1410 transitions. Word has length 238 [2021-12-21 13:39:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:40,526 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1410 transitions. [2021-12-21 13:39:40,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1410 transitions. [2021-12-21 13:39:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-21 13:39:40,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:40,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:40,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:39:40,536 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash -749177318, now seen corresponding path program 1 times [2021-12-21 13:39:40,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:40,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128265318] [2021-12-21 13:39:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:40,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:40,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128265318] [2021-12-21 13:39:40,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128265318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:40,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:40,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:39:40,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869806580] [2021-12-21 13:39:40,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:40,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:39:40,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:39:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:39:40,909 INFO L87 Difference]: Start difference. First operand 899 states and 1410 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:41,078 INFO L93 Difference]: Finished difference Result 2651 states and 4153 transitions. [2021-12-21 13:39:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:39:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-12-21 13:39:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:41,088 INFO L225 Difference]: With dead ends: 2651 [2021-12-21 13:39:41,088 INFO L226 Difference]: Without dead ends: 1763 [2021-12-21 13:39:41,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:39:41,095 INFO L933 BasicCegarLoop]: 1475 mSDtfsCounter, 2015 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:41,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2015 Valid, 2343 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:39:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-12-21 13:39:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-12-21 13:39:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 1.559090909090909) internal successors, (2744), 1760 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2744 transitions. [2021-12-21 13:39:41,208 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2744 transitions. Word has length 238 [2021-12-21 13:39:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:41,210 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2744 transitions. [2021-12-21 13:39:41,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2744 transitions. [2021-12-21 13:39:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-21 13:39:41,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:41,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:41,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:39:41,216 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash -396010790, now seen corresponding path program 1 times [2021-12-21 13:39:41,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687496175] [2021-12-21 13:39:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:41,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:41,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687496175] [2021-12-21 13:39:41,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687496175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:41,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:41,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:41,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379939487] [2021-12-21 13:39:41,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:41,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:41,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:41,338 INFO L87 Difference]: Start difference. First operand 1761 states and 2744 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:41,582 INFO L93 Difference]: Finished difference Result 5096 states and 7908 transitions. [2021-12-21 13:39:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:41,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2021-12-21 13:39:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:41,595 INFO L225 Difference]: With dead ends: 5096 [2021-12-21 13:39:41,595 INFO L226 Difference]: Without dead ends: 3460 [2021-12-21 13:39:41,598 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 [2021-12-21 13:39:41,603 INFO L933 BasicCegarLoop]: 1732 mSDtfsCounter, 790 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:41,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 2610 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:39:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-12-21 13:39:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3458. [2021-12-21 13:39:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 1.5501880242985246) internal successors, (5359), 3457 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 5359 transitions. [2021-12-21 13:39:41,805 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 5359 transitions. Word has length 240 [2021-12-21 13:39:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:41,806 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 5359 transitions. [2021-12-21 13:39:41,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 5359 transitions. [2021-12-21 13:39:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-21 13:39:41,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:41,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:39:41,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1683461535, now seen corresponding path program 1 times [2021-12-21 13:39:41,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:41,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019368489] [2021-12-21 13:39:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:41,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:41,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019368489] [2021-12-21 13:39:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019368489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:41,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:41,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:41,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144588508] [2021-12-21 13:39:41,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:41,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:41,859 INFO L87 Difference]: Start difference. First operand 3458 states and 5359 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:42,136 INFO L93 Difference]: Finished difference Result 10307 states and 15961 transitions. [2021-12-21 13:39:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2021-12-21 13:39:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:42,156 INFO L225 Difference]: With dead ends: 10307 [2021-12-21 13:39:42,157 INFO L226 Difference]: Without dead ends: 6887 [2021-12-21 13:39:42,163 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 [2021-12-21 13:39:42,167 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 908 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:42,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 2731 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:39:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-12-21 13:39:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 3477. [2021-12-21 13:39:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3477 states, 3476 states have (on average 1.5497698504027617) internal successors, (5387), 3476 states have internal predecessors, (5387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3477 states to 3477 states and 5387 transitions. [2021-12-21 13:39:42,411 INFO L78 Accepts]: Start accepts. Automaton has 3477 states and 5387 transitions. Word has length 240 [2021-12-21 13:39:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:42,411 INFO L470 AbstractCegarLoop]: Abstraction has 3477 states and 5387 transitions. [2021-12-21 13:39:42,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3477 states and 5387 transitions. [2021-12-21 13:39:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-21 13:39:42,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:42,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:42,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:39:42,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2119940694, now seen corresponding path program 1 times [2021-12-21 13:39:42,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:42,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474548372] [2021-12-21 13:39:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:42,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:42,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474548372] [2021-12-21 13:39:42,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474548372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:42,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114980534] [2021-12-21 13:39:42,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:42,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:42,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:42,462 INFO L87 Difference]: Start difference. First operand 3477 states and 5387 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:42,851 INFO L93 Difference]: Finished difference Result 10326 states and 15982 transitions. [2021-12-21 13:39:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:42,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 [2021-12-21 13:39:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:42,870 INFO L225 Difference]: With dead ends: 10326 [2021-12-21 13:39:42,870 INFO L226 Difference]: Without dead ends: 6905 [2021-12-21 13:39:42,875 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 [2021-12-21 13:39:42,875 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 903 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:42,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 2731 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:39:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2021-12-21 13:39:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 3495. [2021-12-21 13:39:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 1.54779622209502) internal successors, (5408), 3494 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5408 transitions. [2021-12-21 13:39:43,137 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5408 transitions. Word has length 241 [2021-12-21 13:39:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:43,138 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 5408 transitions. [2021-12-21 13:39:43,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5408 transitions. [2021-12-21 13:39:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-21 13:39:43,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:43,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:43,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:39:43,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1326316299, now seen corresponding path program 1 times [2021-12-21 13:39:43,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:43,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191941937] [2021-12-21 13:39:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:43,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:43,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:43,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191941937] [2021-12-21 13:39:43,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191941937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:43,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:43,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:43,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716191298] [2021-12-21 13:39:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:43,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:43,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:43,219 INFO L87 Difference]: Start difference. First operand 3495 states and 5408 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) [2021-12-21 13:39:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:43,590 INFO L93 Difference]: Finished difference Result 10026 states and 15449 transitions. [2021-12-21 13:39:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:43,591 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 [2021-12-21 13:39:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:43,618 INFO L225 Difference]: With dead ends: 10026 [2021-12-21 13:39:43,619 INFO L226 Difference]: Without dead ends: 6772 [2021-12-21 13:39:43,625 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 [2021-12-21 13:39:43,626 INFO L933 BasicCegarLoop]: 1794 mSDtfsCounter, 783 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2672 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:43,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 2672 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:39:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-12-21 13:39:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6770. [2021-12-21 13:39:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6769 states have (on average 1.5364160141823016) internal successors, (10400), 6769 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 10400 transitions. [2021-12-21 13:39:44,052 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 10400 transitions. Word has length 242 [2021-12-21 13:39:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:44,053 INFO L470 AbstractCegarLoop]: Abstraction has 6770 states and 10400 transitions. [2021-12-21 13:39:44,053 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) [2021-12-21 13:39:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 10400 transitions. [2021-12-21 13:39:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-21 13:39:44,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:44,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:44,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:39:44,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1679226606, now seen corresponding path program 1 times [2021-12-21 13:39:44,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:44,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436412869] [2021-12-21 13:39:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:44,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:44,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:44,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436412869] [2021-12-21 13:39:44,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436412869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:44,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:44,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:39:44,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125991222] [2021-12-21 13:39:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:44,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:39:44,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:39:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:39:44,207 INFO L87 Difference]: Start difference. First operand 6770 states and 10400 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 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) [2021-12-21 13:39:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:45,096 INFO L93 Difference]: Finished difference Result 19780 states and 30329 transitions. [2021-12-21 13:39:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:39:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 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 [2021-12-21 13:39:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:45,120 INFO L225 Difference]: With dead ends: 19780 [2021-12-21 13:39:45,120 INFO L226 Difference]: Without dead ends: 13065 [2021-12-21 13:39:45,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:39:45,128 INFO L933 BasicCegarLoop]: 1419 mSDtfsCounter, 1774 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 3155 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:45,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1774 Valid, 3155 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:39:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13065 states. [2021-12-21 13:39:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13065 to 13063. [2021-12-21 13:39:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13063 states, 13062 states have (on average 1.522661154493952) internal successors, (19889), 13062 states have internal predecessors, (19889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13063 states to 13063 states and 19889 transitions. [2021-12-21 13:39:46,080 INFO L78 Accepts]: Start accepts. Automaton has 13063 states and 19889 transitions. Word has length 242 [2021-12-21 13:39:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:46,080 INFO L470 AbstractCegarLoop]: Abstraction has 13063 states and 19889 transitions. [2021-12-21 13:39:46,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 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) [2021-12-21 13:39:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 13063 states and 19889 transitions. [2021-12-21 13:39:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-21 13:39:46,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:46,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:46,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:39:46,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1986050080, now seen corresponding path program 1 times [2021-12-21 13:39:46,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:46,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656023275] [2021-12-21 13:39:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:46,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:46,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656023275] [2021-12-21 13:39:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656023275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:46,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:46,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:39:46,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369353221] [2021-12-21 13:39:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:46,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:39:46,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:39:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:39:46,257 INFO L87 Difference]: Start difference. First operand 13063 states and 19889 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:48,028 INFO L93 Difference]: Finished difference Result 38371 states and 58335 transitions. [2021-12-21 13:39:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:39:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-21 13:39:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:48,083 INFO L225 Difference]: With dead ends: 38371 [2021-12-21 13:39:48,083 INFO L226 Difference]: Without dead ends: 25505 [2021-12-21 13:39:48,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:39:48,102 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 1960 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:48,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1960 Valid, 2320 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:39:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25505 states. [2021-12-21 13:39:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25505 to 25503. [2021-12-21 13:39:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25503 states, 25502 states have (on average 1.510783467963297) internal successors, (38528), 25502 states have internal predecessors, (38528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25503 states to 25503 states and 38528 transitions. [2021-12-21 13:39:50,028 INFO L78 Accepts]: Start accepts. Automaton has 25503 states and 38528 transitions. Word has length 244 [2021-12-21 13:39:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:50,029 INFO L470 AbstractCegarLoop]: Abstraction has 25503 states and 38528 transitions. [2021-12-21 13:39:50,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 25503 states and 38528 transitions. [2021-12-21 13:39:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-21 13:39:50,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:50,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:50,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:39:50,063 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:50,064 INFO L85 PathProgramCache]: Analyzing trace with hash -624008932, now seen corresponding path program 1 times [2021-12-21 13:39:50,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:50,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274845431] [2021-12-21 13:39:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:50,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:50,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:50,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274845431] [2021-12-21 13:39:50,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274845431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:50,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:50,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:50,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722076180] [2021-12-21 13:39:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:50,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:50,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:50,204 INFO L87 Difference]: Start difference. First operand 25503 states and 38528 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) [2021-12-21 13:39:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:53,220 INFO L93 Difference]: Finished difference Result 75989 states and 114748 transitions. [2021-12-21 13:39:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:53,220 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 [2021-12-21 13:39:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:53,337 INFO L225 Difference]: With dead ends: 75989 [2021-12-21 13:39:53,337 INFO L226 Difference]: Without dead ends: 50771 [2021-12-21 13:39:53,377 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 [2021-12-21 13:39:53,378 INFO L933 BasicCegarLoop]: 1789 mSDtfsCounter, 875 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 2698 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:53,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 2698 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:39:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50771 states. [2021-12-21 13:39:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50771 to 25633. [2021-12-21 13:39:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25633 states, 25632 states have (on average 1.5105337078651686) internal successors, (38718), 25632 states have internal predecessors, (38718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:39:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25633 states to 25633 states and 38718 transitions. [2021-12-21 13:39:55,666 INFO L78 Accepts]: Start accepts. Automaton has 25633 states and 38718 transitions. Word has length 246 [2021-12-21 13:39:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:39:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 25633 states and 38718 transitions. [2021-12-21 13:39:55,666 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) [2021-12-21 13:39:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25633 states and 38718 transitions. [2021-12-21 13:39:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-21 13:39:55,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:39:55,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:39:55,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:39:55,708 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:39:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:39:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1492872855, now seen corresponding path program 1 times [2021-12-21 13:39:55,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:39:55,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790092062] [2021-12-21 13:39:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:39:55,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:39:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:39:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:39:55,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:39:55,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790092062] [2021-12-21 13:39:55,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790092062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:39:55,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:39:55,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:39:55,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354937169] [2021-12-21 13:39:55,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:39:55,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:39:55,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:39:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:39:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:39:55,776 INFO L87 Difference]: Start difference. First operand 25633 states and 38718 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) [2021-12-21 13:39:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:39:59,461 INFO L93 Difference]: Finished difference Result 74771 states and 112664 transitions. [2021-12-21 13:39:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:39:59,462 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 [2021-12-21 13:39:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:39:59,547 INFO L225 Difference]: With dead ends: 74771 [2021-12-21 13:39:59,548 INFO L226 Difference]: Without dead ends: 50161 [2021-12-21 13:39:59,573 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 [2021-12-21 13:39:59,574 INFO L933 BasicCegarLoop]: 1735 mSDtfsCounter, 764 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:39:59,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 2613 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:39:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50161 states. [2021-12-21 13:40:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50161 to 50159. [2021-12-21 13:40:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50159 states, 50158 states have (on average 1.5000996849954145) internal successors, (75242), 50158 states have internal predecessors, (75242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50159 states to 50159 states and 75242 transitions. [2021-12-21 13:40:03,199 INFO L78 Accepts]: Start accepts. Automaton has 50159 states and 75242 transitions. Word has length 246 [2021-12-21 13:40:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:03,200 INFO L470 AbstractCegarLoop]: Abstraction has 50159 states and 75242 transitions. [2021-12-21 13:40:03,200 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) [2021-12-21 13:40:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 50159 states and 75242 transitions. [2021-12-21 13:40:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-21 13:40:03,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:03,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:03,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:40:03,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1918851591, now seen corresponding path program 1 times [2021-12-21 13:40:03,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:03,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737986374] [2021-12-21 13:40:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:03,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:03,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:03,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737986374] [2021-12-21 13:40:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737986374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:03,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:03,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:03,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400336404] [2021-12-21 13:40:03,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:03,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:03,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:03,337 INFO L87 Difference]: Start difference. First operand 50159 states and 75242 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:10,921 INFO L93 Difference]: Finished difference Result 149223 states and 223658 transitions. [2021-12-21 13:40:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-12-21 13:40:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:11,220 INFO L225 Difference]: With dead ends: 149223 [2021-12-21 13:40:11,220 INFO L226 Difference]: Without dead ends: 99747 [2021-12-21 13:40:11,296 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 [2021-12-21 13:40:11,296 INFO L933 BasicCegarLoop]: 1787 mSDtfsCounter, 871 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:11,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 2696 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99747 states.