./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-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 4086756fe326e2f90904c763827ae3d38d44a78a9eb1422e3198b9e38a459658 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:15:59,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:15:59,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:15:59,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:15:59,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:15:59,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:15:59,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:15:59,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:15:59,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:15:59,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:15:59,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:15:59,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:15:59,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:15:59,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:15:59,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:15:59,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:15:59,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:15:59,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:15:59,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:15:59,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:15:59,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:15:59,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:15:59,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:15:59,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:15:59,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:15:59,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:15:59,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:15:59,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:15:59,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:15:59,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:15:59,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:15:59,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:15:59,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:15:59,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:15:59,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:15:59,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:15:59,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:15:59,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:15:59,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:15:59,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:15:59,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:15:59,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:15:59,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:15:59,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:15:59,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:15:59,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:15:59,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:15:59,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:15:59,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:15:59,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:15:59,393 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:15:59,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:15:59,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:15:59,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:15:59,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:15:59,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:15:59,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:15:59,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:15:59,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:15:59,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:15:59,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:15:59,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:15:59,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:15:59,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:15:59,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:15:59,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:15:59,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:15:59,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:15:59,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:15:59,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:15:59,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:15:59,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:15:59,398 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:15:59,398 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:15:59,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:15:59,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:15:59,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4086756fe326e2f90904c763827ae3d38d44a78a9eb1422e3198b9e38a459658 [2021-12-22 12:15:59,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:15:59,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:15:59,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:15:59,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:15:59,618 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:15:59,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-22 12:15:59,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b30512e/9f4a148b445d49a683d3038b0d98153b/FLAG9e4f82610 [2021-12-22 12:16:00,102 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:16:00,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-22 12:16:00,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b30512e/9f4a148b445d49a683d3038b0d98153b/FLAG9e4f82610 [2021-12-22 12:16:00,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b30512e/9f4a148b445d49a683d3038b0d98153b [2021-12-22 12:16:00,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:16:00,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:16:00,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:16:00,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:16:00,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:16:00,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:00,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1225045b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00, skipping insertion in model container [2021-12-22 12:16:00,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:00,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:16:00,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:16:00,756 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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2021-12-22 12:16:00,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:16:00,827 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:16:00,889 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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2021-12-22 12:16:00,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:16:00,931 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:16:00,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00 WrapperNode [2021-12-22 12:16:00,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:16:00,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:16:00,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:16:00,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:16:00,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:00,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:00,993 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 635 [2021-12-22 12:16:01,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:16:01,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:16:01,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:16:01,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:16:01,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:16:01,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:16:01,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:16:01,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:16:01,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (1/1) ... [2021-12-22 12:16:01,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:16:01,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:16:01,077 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) [2021-12-22 12:16:01,087 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 [2021-12-22 12:16:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:16:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:16:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:16:01,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:16:01,205 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:16:01,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:16:01,729 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:16:01,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:16:01,736 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:16:01,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:16:01 BoogieIcfgContainer [2021-12-22 12:16:01,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:16:01,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:16:01,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:16:01,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:16:01,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:16:00" (1/3) ... [2021-12-22 12:16:01,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ecc1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:16:01, skipping insertion in model container [2021-12-22 12:16:01,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:16:00" (2/3) ... [2021-12-22 12:16:01,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ecc1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:16:01, skipping insertion in model container [2021-12-22 12:16:01,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:16:01" (3/3) ... [2021-12-22 12:16:01,745 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-22 12:16:01,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:16:01,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:16:01,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:16:01,795 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 [2021-12-22 12:16:01,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:16:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7450980392156863) internal successors, (267), 154 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 12:16:01,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:01,822 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] [2021-12-22 12:16:01,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1975649421, now seen corresponding path program 1 times [2021-12-22 12:16:01,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:01,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475085846] [2021-12-22 12:16:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:01,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:02,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:02,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475085846] [2021-12-22 12:16:02,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475085846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:02,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:02,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:02,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339411141] [2021-12-22 12:16:02,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:02,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:02,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:02,260 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7450980392156863) internal successors, (267), 154 states have internal predecessors, (267), 0 states have call successors, (0), 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 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:02,368 INFO L93 Difference]: Finished difference Result 341 states and 571 transitions. [2021-12-22 12:16:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:16:02,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-22 12:16:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:02,380 INFO L225 Difference]: With dead ends: 341 [2021-12-22 12:16:02,380 INFO L226 Difference]: Without dead ends: 237 [2021-12-22 12:16:02,383 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 [2021-12-22 12:16:02,386 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 157 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:02,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 460 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-22 12:16:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-12-22 12:16:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5665236051502145) internal successors, (365), 233 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 365 transitions. [2021-12-22 12:16:02,443 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 365 transitions. Word has length 62 [2021-12-22 12:16:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:02,444 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 365 transitions. [2021-12-22 12:16:02,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 365 transitions. [2021-12-22 12:16:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:16:02,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:02,447 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] [2021-12-22 12:16:02,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:16:02,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1826541876, now seen corresponding path program 1 times [2021-12-22 12:16:02,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354097854] [2021-12-22 12:16:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:02,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:02,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:02,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354097854] [2021-12-22 12:16:02,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354097854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:02,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:02,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:02,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164102959] [2021-12-22 12:16:02,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:02,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:02,544 INFO L87 Difference]: Start difference. First operand 234 states and 365 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:02,603 INFO L93 Difference]: Finished difference Result 572 states and 917 transitions. [2021-12-22 12:16:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:16:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-22 12:16:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:02,608 INFO L225 Difference]: With dead ends: 572 [2021-12-22 12:16:02,609 INFO L226 Difference]: Without dead ends: 395 [2021-12-22 12:16:02,610 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 [2021-12-22 12:16:02,611 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 133 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:02,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 430 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-12-22 12:16:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2021-12-22 12:16:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.5897435897435896) internal successors, (620), 390 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 620 transitions. [2021-12-22 12:16:02,662 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 620 transitions. Word has length 64 [2021-12-22 12:16:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:02,663 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 620 transitions. [2021-12-22 12:16:02,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 620 transitions. [2021-12-22 12:16:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 12:16:02,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:02,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:02,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:16:02,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1385775307, now seen corresponding path program 1 times [2021-12-22 12:16:02,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:02,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494431230] [2021-12-22 12:16:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:02,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:02,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494431230] [2021-12-22 12:16:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494431230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:02,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:02,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:02,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881346024] [2021-12-22 12:16:02,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:02,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:02,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:02,783 INFO L87 Difference]: Start difference. First operand 391 states and 620 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:02,845 INFO L93 Difference]: Finished difference Result 1027 states and 1654 transitions. [2021-12-22 12:16:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:16:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 12:16:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:02,851 INFO L225 Difference]: With dead ends: 1027 [2021-12-22 12:16:02,851 INFO L226 Difference]: Without dead ends: 693 [2021-12-22 12:16:02,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:02,858 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 127 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:02,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 431 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-12-22 12:16:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 687. [2021-12-22 12:16:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.597667638483965) internal successors, (1096), 686 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1096 transitions. [2021-12-22 12:16:02,919 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1096 transitions. Word has length 66 [2021-12-22 12:16:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:02,919 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1096 transitions. [2021-12-22 12:16:02,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1096 transitions. [2021-12-22 12:16:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:16:02,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:02,937 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] [2021-12-22 12:16:02,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:16:02,937 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash -190660810, now seen corresponding path program 1 times [2021-12-22 12:16:02,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414872165] [2021-12-22 12:16:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:02,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:03,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:03,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414872165] [2021-12-22 12:16:03,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414872165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:03,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:03,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:03,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985812995] [2021-12-22 12:16:03,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:03,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:03,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:03,042 INFO L87 Difference]: Start difference. First operand 687 states and 1096 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:03,333 INFO L93 Difference]: Finished difference Result 2979 states and 4854 transitions. [2021-12-22 12:16:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 12:16:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-22 12:16:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:03,344 INFO L225 Difference]: With dead ends: 2979 [2021-12-22 12:16:03,344 INFO L226 Difference]: Without dead ends: 2349 [2021-12-22 12:16:03,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:16:03,347 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 1026 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:03,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1596 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:16:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-12-22 12:16:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1239. [2021-12-22 12:16:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.6082390953150243) internal successors, (1991), 1238 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1991 transitions. [2021-12-22 12:16:03,452 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1991 transitions. Word has length 68 [2021-12-22 12:16:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:03,453 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1991 transitions. [2021-12-22 12:16:03,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1991 transitions. [2021-12-22 12:16:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:16:03,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:03,455 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] [2021-12-22 12:16:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:16:03,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1678021987, now seen corresponding path program 1 times [2021-12-22 12:16:03,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:03,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628046198] [2021-12-22 12:16:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:03,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:03,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628046198] [2021-12-22 12:16:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628046198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:03,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:03,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:16:03,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144121408] [2021-12-22 12:16:03,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:03,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:16:03,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:03,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:16:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:03,539 INFO L87 Difference]: Start difference. First operand 1239 states and 1991 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:03,754 INFO L93 Difference]: Finished difference Result 3619 states and 5887 transitions. [2021-12-22 12:16:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:16:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:16:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:03,768 INFO L225 Difference]: With dead ends: 3619 [2021-12-22 12:16:03,768 INFO L226 Difference]: Without dead ends: 2437 [2021-12-22 12:16:03,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:03,772 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 456 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:03,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 787 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-12-22 12:16:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1829. [2021-12-22 12:16:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 1.6148796498905909) internal successors, (2952), 1828 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2952 transitions. [2021-12-22 12:16:03,922 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2952 transitions. Word has length 69 [2021-12-22 12:16:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:03,924 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2952 transitions. [2021-12-22 12:16:03,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2952 transitions. [2021-12-22 12:16:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 12:16:03,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:03,929 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] [2021-12-22 12:16:03,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:16:03,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -537020195, now seen corresponding path program 1 times [2021-12-22 12:16:03,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:03,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658548090] [2021-12-22 12:16:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:03,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:04,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:04,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658548090] [2021-12-22 12:16:04,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658548090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:04,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:04,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:16:04,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830038680] [2021-12-22 12:16:04,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:16:04,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:16:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:04,017 INFO L87 Difference]: Start difference. First operand 1829 states and 2952 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:04,297 INFO L93 Difference]: Finished difference Result 5313 states and 8631 transitions. [2021-12-22 12:16:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:16:04,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-22 12:16:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:04,311 INFO L225 Difference]: With dead ends: 5313 [2021-12-22 12:16:04,312 INFO L226 Difference]: Without dead ends: 3541 [2021-12-22 12:16:04,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:04,319 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 456 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:04,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 729 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-12-22 12:16:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2673. [2021-12-22 12:16:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2672 states have (on average 1.6137724550898203) internal successors, (4312), 2672 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 4312 transitions. [2021-12-22 12:16:04,522 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 4312 transitions. Word has length 70 [2021-12-22 12:16:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:04,523 INFO L470 AbstractCegarLoop]: Abstraction has 2673 states and 4312 transitions. [2021-12-22 12:16:04,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 4312 transitions. [2021-12-22 12:16:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 12:16:04,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:04,525 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] [2021-12-22 12:16:04,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:16:04,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash 478855012, now seen corresponding path program 1 times [2021-12-22 12:16:04,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:04,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702673077] [2021-12-22 12:16:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:04,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:04,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:04,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702673077] [2021-12-22 12:16:04,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702673077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:04,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:04,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:16:04,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545297747] [2021-12-22 12:16:04,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:04,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:16:04,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:04,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:16:04,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:04,589 INFO L87 Difference]: Start difference. First operand 2673 states and 4312 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:04,971 INFO L93 Difference]: Finished difference Result 7713 states and 12507 transitions. [2021-12-22 12:16:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:16:04,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-22 12:16:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:04,992 INFO L225 Difference]: With dead ends: 7713 [2021-12-22 12:16:04,992 INFO L226 Difference]: Without dead ends: 5097 [2021-12-22 12:16:04,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:05,000 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 454 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:05,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 772 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-12-22 12:16:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3869. [2021-12-22 12:16:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 1.6116856256463288) internal successors, (6234), 3868 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 6234 transitions. [2021-12-22 12:16:05,273 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 6234 transitions. Word has length 71 [2021-12-22 12:16:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:05,273 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 6234 transitions. [2021-12-22 12:16:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 6234 transitions. [2021-12-22 12:16:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 12:16:05,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:05,279 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] [2021-12-22 12:16:05,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:16:05,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1637619353, now seen corresponding path program 1 times [2021-12-22 12:16:05,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:05,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18969499] [2021-12-22 12:16:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:05,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:05,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18969499] [2021-12-22 12:16:05,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18969499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:05,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:05,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:05,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811093935] [2021-12-22 12:16:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:05,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:05,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:05,358 INFO L87 Difference]: Start difference. First operand 3869 states and 6234 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:05,830 INFO L93 Difference]: Finished difference Result 8646 states and 14040 transitions. [2021-12-22 12:16:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:16:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 12:16:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:05,854 INFO L225 Difference]: With dead ends: 8646 [2021-12-22 12:16:05,854 INFO L226 Difference]: Without dead ends: 5881 [2021-12-22 12:16:05,873 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 [2021-12-22 12:16:05,873 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 138 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:05,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 536 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2021-12-22 12:16:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 5879. [2021-12-22 12:16:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5879 states, 5878 states have (on average 1.6124532153793807) internal successors, (9478), 5878 states have internal predecessors, (9478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5879 states to 5879 states and 9478 transitions. [2021-12-22 12:16:06,311 INFO L78 Accepts]: Start accepts. Automaton has 5879 states and 9478 transitions. Word has length 72 [2021-12-22 12:16:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:06,311 INFO L470 AbstractCegarLoop]: Abstraction has 5879 states and 9478 transitions. [2021-12-22 12:16:06,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5879 states and 9478 transitions. [2021-12-22 12:16:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 12:16:06,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:06,313 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] [2021-12-22 12:16:06,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:16:06,315 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:06,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1419254461, now seen corresponding path program 1 times [2021-12-22 12:16:06,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:06,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554153269] [2021-12-22 12:16:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:06,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:06,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:06,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554153269] [2021-12-22 12:16:06,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554153269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:06,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:06,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:06,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143628126] [2021-12-22 12:16:06,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:06,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:06,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:06,357 INFO L87 Difference]: Start difference. First operand 5879 states and 9478 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:07,004 INFO L93 Difference]: Finished difference Result 12993 states and 20995 transitions. [2021-12-22 12:16:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:16:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 12:16:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:07,047 INFO L225 Difference]: With dead ends: 12993 [2021-12-22 12:16:07,047 INFO L226 Difference]: Without dead ends: 8823 [2021-12-22 12:16:07,057 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 [2021-12-22 12:16:07,059 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 126 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:07,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 481 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:07,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8823 states. [2021-12-22 12:16:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8823 to 8821. [2021-12-22 12:16:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 8820 states have (on average 1.6052154195011339) internal successors, (14158), 8820 states have internal predecessors, (14158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 14158 transitions. [2021-12-22 12:16:07,825 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 14158 transitions. Word has length 72 [2021-12-22 12:16:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:07,825 INFO L470 AbstractCegarLoop]: Abstraction has 8821 states and 14158 transitions. [2021-12-22 12:16:07,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 14158 transitions. [2021-12-22 12:16:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 12:16:07,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:07,827 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] [2021-12-22 12:16:07,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:16:07,828 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash 569279253, now seen corresponding path program 1 times [2021-12-22 12:16:07,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:07,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660637407] [2021-12-22 12:16:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:07,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:07,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660637407] [2021-12-22 12:16:07,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660637407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:07,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:07,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:07,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714819631] [2021-12-22 12:16:07,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:07,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:07,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:07,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:07,874 INFO L87 Difference]: Start difference. First operand 8821 states and 14158 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:08,637 INFO L93 Difference]: Finished difference Result 19170 states and 30844 transitions. [2021-12-22 12:16:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:16:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 12:16:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:08,669 INFO L225 Difference]: With dead ends: 19170 [2021-12-22 12:16:08,670 INFO L226 Difference]: Without dead ends: 12906 [2021-12-22 12:16:08,685 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 [2021-12-22 12:16:08,685 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 132 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:08,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 521 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-12-22 12:16:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 12904. [2021-12-22 12:16:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12904 states, 12903 states have (on average 1.5969154460203054) internal successors, (20605), 12903 states have internal predecessors, (20605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12904 states to 12904 states and 20605 transitions. [2021-12-22 12:16:09,677 INFO L78 Accepts]: Start accepts. Automaton has 12904 states and 20605 transitions. Word has length 72 [2021-12-22 12:16:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:09,678 INFO L470 AbstractCegarLoop]: Abstraction has 12904 states and 20605 transitions. [2021-12-22 12:16:09,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 12904 states and 20605 transitions. [2021-12-22 12:16:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 12:16:09,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:09,679 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] [2021-12-22 12:16:09,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:16:09,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash -899144939, now seen corresponding path program 1 times [2021-12-22 12:16:09,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:09,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700377046] [2021-12-22 12:16:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:09,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:09,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:09,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700377046] [2021-12-22 12:16:09,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700377046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:09,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:09,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:09,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441291443] [2021-12-22 12:16:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:09,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:09,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:09,798 INFO L87 Difference]: Start difference. First operand 12904 states and 20605 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:10,753 INFO L93 Difference]: Finished difference Result 25719 states and 41086 transitions. [2021-12-22 12:16:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-22 12:16:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:10,791 INFO L225 Difference]: With dead ends: 25719 [2021-12-22 12:16:10,791 INFO L226 Difference]: Without dead ends: 12906 [2021-12-22 12:16:10,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:16:10,815 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 455 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:10,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 635 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-12-22 12:16:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 12904. [2021-12-22 12:16:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12904 states, 12903 states have (on average 1.5872277764860885) internal successors, (20480), 12903 states have internal predecessors, (20480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12904 states to 12904 states and 20480 transitions. [2021-12-22 12:16:11,619 INFO L78 Accepts]: Start accepts. Automaton has 12904 states and 20480 transitions. Word has length 73 [2021-12-22 12:16:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:11,619 INFO L470 AbstractCegarLoop]: Abstraction has 12904 states and 20480 transitions. [2021-12-22 12:16:11,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 12904 states and 20480 transitions. [2021-12-22 12:16:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-22 12:16:11,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:11,620 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] [2021-12-22 12:16:11,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:16:11,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash -764385937, now seen corresponding path program 1 times [2021-12-22 12:16:11,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:11,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125810063] [2021-12-22 12:16:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:11,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:11,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:11,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125810063] [2021-12-22 12:16:11,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125810063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:11,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:11,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:11,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370876050] [2021-12-22 12:16:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:11,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:11,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:11,700 INFO L87 Difference]: Start difference. First operand 12904 states and 20480 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:12,948 INFO L93 Difference]: Finished difference Result 36939 states and 58780 transitions. [2021-12-22 12:16:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-22 12:16:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:13,098 INFO L225 Difference]: With dead ends: 36939 [2021-12-22 12:16:13,099 INFO L226 Difference]: Without dead ends: 24126 [2021-12-22 12:16:13,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:16:13,123 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 323 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:13,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 641 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24126 states. [2021-12-22 12:16:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24126 to 24124. [2021-12-22 12:16:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24124 states, 24123 states have (on average 1.576711022675455) internal successors, (38035), 24123 states have internal predecessors, (38035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24124 states to 24124 states and 38035 transitions. [2021-12-22 12:16:14,742 INFO L78 Accepts]: Start accepts. Automaton has 24124 states and 38035 transitions. Word has length 76 [2021-12-22 12:16:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:14,742 INFO L470 AbstractCegarLoop]: Abstraction has 24124 states and 38035 transitions. [2021-12-22 12:16:14,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24124 states and 38035 transitions. [2021-12-22 12:16:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 12:16:14,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:14,743 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] [2021-12-22 12:16:14,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:16:14,744 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2071930450, now seen corresponding path program 1 times [2021-12-22 12:16:14,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:14,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907576805] [2021-12-22 12:16:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:14,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:16:14,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907576805] [2021-12-22 12:16:14,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907576805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:14,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:14,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:14,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796928799] [2021-12-22 12:16:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:14,818 INFO L87 Difference]: Start difference. First operand 24124 states and 38035 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:17,443 INFO L93 Difference]: Finished difference Result 46051 states and 72316 transitions. [2021-12-22 12:16:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:16:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-22 12:16:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:17,531 INFO L225 Difference]: With dead ends: 46051 [2021-12-22 12:16:17,531 INFO L226 Difference]: Without dead ends: 46049 [2021-12-22 12:16:17,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:16:17,550 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 286 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:17,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1094 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46049 states. [2021-12-22 12:16:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46049 to 24848. [2021-12-22 12:16:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24848 states, 24847 states have (on average 1.5595444118002173) internal successors, (38750), 24847 states have internal predecessors, (38750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24848 states to 24848 states and 38750 transitions. [2021-12-22 12:16:19,564 INFO L78 Accepts]: Start accepts. Automaton has 24848 states and 38750 transitions. Word has length 77 [2021-12-22 12:16:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:19,564 INFO L470 AbstractCegarLoop]: Abstraction has 24848 states and 38750 transitions. [2021-12-22 12:16:19,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24848 states and 38750 transitions. [2021-12-22 12:16:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 12:16:19,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:19,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:19,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 12:16:19,588 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:19,588 INFO L85 PathProgramCache]: Analyzing trace with hash 555059603, now seen corresponding path program 1 times [2021-12-22 12:16:19,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:19,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373444356] [2021-12-22 12:16:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:19,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:16:19,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:19,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373444356] [2021-12-22 12:16:19,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373444356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:19,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:19,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:19,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476809796] [2021-12-22 12:16:19,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:19,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:19,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:19,668 INFO L87 Difference]: Start difference. First operand 24848 states and 38750 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:23,404 INFO L93 Difference]: Finished difference Result 60736 states and 95072 transitions. [2021-12-22 12:16:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-22 12:16:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:23,500 INFO L225 Difference]: With dead ends: 60736 [2021-12-22 12:16:23,500 INFO L226 Difference]: Without dead ends: 48774 [2021-12-22 12:16:23,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:16:23,546 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 576 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:23,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1049 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48774 states. [2021-12-22 12:16:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48774 to 38128. [2021-12-22 12:16:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38128 states, 38127 states have (on average 1.5578986020405488) internal successors, (59398), 38127 states have internal predecessors, (59398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38128 states to 38128 states and 59398 transitions. [2021-12-22 12:16:26,216 INFO L78 Accepts]: Start accepts. Automaton has 38128 states and 59398 transitions. Word has length 103 [2021-12-22 12:16:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:26,216 INFO L470 AbstractCegarLoop]: Abstraction has 38128 states and 59398 transitions. [2021-12-22 12:16:26,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 38128 states and 59398 transitions. [2021-12-22 12:16:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 12:16:26,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:26,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:26,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 12:16:26,220 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 773424495, now seen corresponding path program 1 times [2021-12-22 12:16:26,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:26,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632267874] [2021-12-22 12:16:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:26,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 12:16:26,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:26,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632267874] [2021-12-22 12:16:26,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632267874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:26,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:26,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:26,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227645156] [2021-12-22 12:16:26,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:26,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:26,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:26,296 INFO L87 Difference]: Start difference. First operand 38128 states and 59398 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:30,374 INFO L93 Difference]: Finished difference Result 68122 states and 106644 transitions. [2021-12-22 12:16:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:30,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 103 [2021-12-22 12:16:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:30,471 INFO L225 Difference]: With dead ends: 68122 [2021-12-22 12:16:30,471 INFO L226 Difference]: Without dead ends: 56390 [2021-12-22 12:16:30,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:16:30,497 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 587 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:30,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 1046 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56390 states. [2021-12-22 12:16:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56390 to 51632. [2021-12-22 12:16:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51632 states, 51631 states have (on average 1.559605663264318) internal successors, (80524), 51631 states have internal predecessors, (80524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51632 states to 51632 states and 80524 transitions. [2021-12-22 12:16:34,178 INFO L78 Accepts]: Start accepts. Automaton has 51632 states and 80524 transitions. Word has length 103 [2021-12-22 12:16:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:34,179 INFO L470 AbstractCegarLoop]: Abstraction has 51632 states and 80524 transitions. [2021-12-22 12:16:34,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 51632 states and 80524 transitions. [2021-12-22 12:16:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 12:16:34,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:34,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:34,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:16:34,182 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1533009087, now seen corresponding path program 1 times [2021-12-22 12:16:34,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:34,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111530451] [2021-12-22 12:16:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:34,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 12:16:34,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:34,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111530451] [2021-12-22 12:16:34,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111530451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:34,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:34,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:34,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967331928] [2021-12-22 12:16:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:34,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:34,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:34,241 INFO L87 Difference]: Start difference. First operand 51632 states and 80524 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:38,559 INFO L93 Difference]: Finished difference Result 72782 states and 113944 transitions. [2021-12-22 12:16:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 103 [2021-12-22 12:16:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:38,658 INFO L225 Difference]: With dead ends: 72782 [2021-12-22 12:16:38,658 INFO L226 Difference]: Without dead ends: 61050 [2021-12-22 12:16:38,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:16:38,682 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 582 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:38,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1150 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61050 states. [2021-12-22 12:16:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61050 to 59156. [2021-12-22 12:16:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59156 states, 59155 states have (on average 1.5613219508072014) internal successors, (92360), 59155 states have internal predecessors, (92360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59156 states to 59156 states and 92360 transitions. [2021-12-22 12:16:43,271 INFO L78 Accepts]: Start accepts. Automaton has 59156 states and 92360 transitions. Word has length 103 [2021-12-22 12:16:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:43,272 INFO L470 AbstractCegarLoop]: Abstraction has 59156 states and 92360 transitions. [2021-12-22 12:16:43,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 59156 states and 92360 transitions. [2021-12-22 12:16:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 12:16:43,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:43,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:43,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:16:43,275 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -35525664, now seen corresponding path program 1 times [2021-12-22 12:16:43,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:43,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613326871] [2021-12-22 12:16:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:43,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:16:43,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613326871] [2021-12-22 12:16:43,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613326871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:43,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:43,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:16:43,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781958597] [2021-12-22 12:16:43,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:43,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:16:43,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:16:43,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:43,328 INFO L87 Difference]: Start difference. First operand 59156 states and 92360 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:48,873 INFO L93 Difference]: Finished difference Result 96279 states and 151019 transitions. [2021-12-22 12:16:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:16:48,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-22 12:16:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:49,007 INFO L225 Difference]: With dead ends: 96279 [2021-12-22 12:16:49,007 INFO L226 Difference]: Without dead ends: 76701 [2021-12-22 12:16:49,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:49,038 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 267 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:49,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 737 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76701 states.