./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label39.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 458d694afbb3bfd6aed28352ce176f8d7e28b3da8c081e4ca83ee27f62e7ab73 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:46:44,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:46:44,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:46:44,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:46:44,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:46:44,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:46:44,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:46:44,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:46:44,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:46:44,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:46:44,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:46:44,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:46:44,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:46:44,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:46:44,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:46:44,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:46:44,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:46:44,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:46:44,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:46:44,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:46:44,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:46:44,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:46:44,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:46:44,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:46:44,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:46:44,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:46:44,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:46:44,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:46:44,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:46:44,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:46:44,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:46:44,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:46:44,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:46:44,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:46:44,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:46:44,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:46:44,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:46:44,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:46:44,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:46:44,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:46:44,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:46:44,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:46:44,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:46:44,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:46:44,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:46:44,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:46:44,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:46:44,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:46:44,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:46:44,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:46:44,467 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:46:44,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:46:44,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:46:44,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:46:44,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:46:44,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:46:44,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:46:44,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:46:44,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:46:44,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:46:44,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:46:44,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:46:44,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:46:44,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:46:44,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:46:44,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:46:44,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:46:44,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:46:44,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:46:44,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:46:44,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:46:44,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:46:44,472 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:46:44,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:46:44,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:46:44,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:46:44,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 458d694afbb3bfd6aed28352ce176f8d7e28b3da8c081e4ca83ee27f62e7ab73 [2021-12-15 22:46:44,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:46:44,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:46:44,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:46:44,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:46:44,675 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:46:44,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2021-12-15 22:46:44,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f760fc54/88a819086f894d62b5316af8f37e8305/FLAGa45c8e363 [2021-12-15 22:46:45,335 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:46:45,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2021-12-15 22:46:45,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f760fc54/88a819086f894d62b5316af8f37e8305/FLAGa45c8e363 [2021-12-15 22:46:45,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f760fc54/88a819086f894d62b5316af8f37e8305 [2021-12-15 22:46:45,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:46:45,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:46:45,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:46:45,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:46:45,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:46:45,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:46:45" (1/1) ... [2021-12-15 22:46:45,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a198463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:45, skipping insertion in model container [2021-12-15 22:46:45,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:46:45" (1/1) ... [2021-12-15 22:46:45,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:46:45,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:46:46,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2021-12-15 22:46:46,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:46:46,579 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:46:46,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2021-12-15 22:46:46,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:46:46,968 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:46:46,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46 WrapperNode [2021-12-15 22:46:46,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:46:46,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:46:46,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:46:46,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:46:46,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,456 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:46:47,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:46:47,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:46:47,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:46:47,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:46:47,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:46:47,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:46:47,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:46:47,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:46:47,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (1/1) ... [2021-12-15 22:46:47,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:46:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:46:47,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:46:47,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:46:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:46:47,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:46:47,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:46:47,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:46:48,032 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:46:48,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:46:51,261 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:46:51,274 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:46:51,274 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:46:51,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:46:51 BoogieIcfgContainer [2021-12-15 22:46:51,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:46:51,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:46:51,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:46:51,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:46:51,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:46:45" (1/3) ... [2021-12-15 22:46:51,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141ba9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:46:51, skipping insertion in model container [2021-12-15 22:46:51,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:46" (2/3) ... [2021-12-15 22:46:51,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141ba9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:46:51, skipping insertion in model container [2021-12-15 22:46:51,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:46:51" (3/3) ... [2021-12-15 22:46:51,282 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label39.c [2021-12-15 22:46:51,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:46:51,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:46:51,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:46:51,323 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:46:51,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:46:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:46:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:46:51,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:51,350 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] [2021-12-15 22:46:51,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2122806209, now seen corresponding path program 1 times [2021-12-15 22:46:51,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210790608] [2021-12-15 22:46:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:51,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:51,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210790608] [2021-12-15 22:46:51,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210790608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:51,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:51,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:51,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57142882] [2021-12-15 22:46:51,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:46:51,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:46:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:46:51,637 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:46:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:57,062 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-15 22:46:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:46:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-15 22:46:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:57,092 INFO L225 Difference]: With dead ends: 3829 [2021-12-15 22:46:57,093 INFO L226 Difference]: Without dead ends: 2664 [2021-12-15 22:46:57,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:46:57,106 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2688 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2688 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:57,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2688 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 22:46:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-15 22:46:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-15 22:46:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:46:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-15 22:46:57,196 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 51 [2021-12-15 22:46:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:57,197 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-15 22:46:57,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:46:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-15 22:46:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 22:46:57,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:57,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:46:57,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:46:57,209 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1216054921, now seen corresponding path program 1 times [2021-12-15 22:46:57,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:57,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803007659] [2021-12-15 22:46:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:57,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:57,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803007659] [2021-12-15 22:46:57,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803007659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:46:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473894058] [2021-12-15 22:46:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:57,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:46:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:46:57,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:46:57,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:46:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:46:57,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:46:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:57,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:46:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:58,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473894058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:46:58,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:46:58,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-15 22:46:58,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966813378] [2021-12-15 22:46:58,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:46:58,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 22:46:58,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 22:46:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:46:58,810 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 6 states, 6 states have (on average 58.5) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:09,507 INFO L93 Difference]: Finished difference Result 13499 states and 22028 transitions. [2021-12-15 22:47:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 22:47:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 58.5) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 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 176 [2021-12-15 22:47:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:09,539 INFO L225 Difference]: With dead ends: 13499 [2021-12-15 22:47:09,539 INFO L226 Difference]: Without dead ends: 11625 [2021-12-15 22:47:09,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:47:09,544 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 5493 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 11040 mSolverCounterSat, 3574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5493 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 14614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3574 IncrementalHoareTripleChecker+Valid, 11040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:09,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5493 Valid, 952 Invalid, 14614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3574 Valid, 11040 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2021-12-15 22:47:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-12-15 22:47:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 5857. [2021-12-15 22:47:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5857 states, 5856 states have (on average 1.400785519125683) internal successors, (8203), 5856 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 8203 transitions. [2021-12-15 22:47:09,662 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 8203 transitions. Word has length 176 [2021-12-15 22:47:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:09,663 INFO L470 AbstractCegarLoop]: Abstraction has 5857 states and 8203 transitions. [2021-12-15 22:47:09,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.5) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 8203 transitions. [2021-12-15 22:47:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-15 22:47:09,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:09,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:09,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:47:09,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:47:09,888 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 200647787, now seen corresponding path program 1 times [2021-12-15 22:47:09,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:09,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051622603] [2021-12-15 22:47:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:09,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:47:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051622603] [2021-12-15 22:47:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051622603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:09,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:09,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:47:09,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965197478] [2021-12-15 22:47:09,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:09,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:09,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:09,990 INFO L87 Difference]: Start difference. First operand 5857 states and 8203 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:12,724 INFO L93 Difference]: Finished difference Result 15689 states and 22628 transitions. [2021-12-15 22:47:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:12,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 218 [2021-12-15 22:47:12,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:12,749 INFO L225 Difference]: With dead ends: 15689 [2021-12-15 22:47:12,749 INFO L226 Difference]: Without dead ends: 10621 [2021-12-15 22:47:12,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:12,757 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 939 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:12,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 895 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:47:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2021-12-15 22:47:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 9034. [2021-12-15 22:47:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 1.3494962913760655) internal successors, (12190), 9033 states have internal predecessors, (12190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 12190 transitions. [2021-12-15 22:47:12,877 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 12190 transitions. Word has length 218 [2021-12-15 22:47:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:12,877 INFO L470 AbstractCegarLoop]: Abstraction has 9034 states and 12190 transitions. [2021-12-15 22:47:12,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 12190 transitions. [2021-12-15 22:47:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-15 22:47:12,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:12,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:12,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:47:12,890 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1628126726, now seen corresponding path program 1 times [2021-12-15 22:47:12,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873392446] [2021-12-15 22:47:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:12,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-15 22:47:13,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873392446] [2021-12-15 22:47:13,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873392446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:13,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:13,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:47:13,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964025628] [2021-12-15 22:47:13,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:13,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:13,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:13,077 INFO L87 Difference]: Start difference. First operand 9034 states and 12190 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:15,705 INFO L93 Difference]: Finished difference Result 25153 states and 34490 transitions. [2021-12-15 22:47:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-15 22:47:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:15,749 INFO L225 Difference]: With dead ends: 25153 [2021-12-15 22:47:15,750 INFO L226 Difference]: Without dead ends: 16908 [2021-12-15 22:47:15,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:15,764 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 858 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:15,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 979 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:47:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16908 states. [2021-12-15 22:47:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16908 to 16114. [2021-12-15 22:47:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16114 states, 16113 states have (on average 1.2602867250046546) internal successors, (20307), 16113 states have internal predecessors, (20307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16114 states to 16114 states and 20307 transitions. [2021-12-15 22:47:16,013 INFO L78 Accepts]: Start accepts. Automaton has 16114 states and 20307 transitions. Word has length 244 [2021-12-15 22:47:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 16114 states and 20307 transitions. [2021-12-15 22:47:16,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 16114 states and 20307 transitions. [2021-12-15 22:47:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-15 22:47:16,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:16,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:16,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:47:16,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1810841034, now seen corresponding path program 1 times [2021-12-15 22:47:16,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481563497] [2021-12-15 22:47:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:16,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:47:16,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481563497] [2021-12-15 22:47:16,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481563497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:16,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:16,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:16,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704190841] [2021-12-15 22:47:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:16,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:47:16,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:47:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:47:16,099 INFO L87 Difference]: Start difference. First operand 16114 states and 20307 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:22,140 INFO L93 Difference]: Finished difference Result 58422 states and 74669 transitions. [2021-12-15 22:47:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:47:22,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2021-12-15 22:47:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:22,213 INFO L225 Difference]: With dead ends: 58422 [2021-12-15 22:47:22,214 INFO L226 Difference]: Without dead ends: 43097 [2021-12-15 22:47:22,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:47:22,232 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 1717 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 6786 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 7862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 6786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:22,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 873 Invalid, 7862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 6786 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-15 22:47:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43097 states. [2021-12-15 22:47:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43097 to 40605. [2021-12-15 22:47:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40605 states, 40604 states have (on average 1.2407890848192296) internal successors, (50381), 40604 states have internal predecessors, (50381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40605 states to 40605 states and 50381 transitions. [2021-12-15 22:47:22,852 INFO L78 Accepts]: Start accepts. Automaton has 40605 states and 50381 transitions. Word has length 248 [2021-12-15 22:47:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:22,853 INFO L470 AbstractCegarLoop]: Abstraction has 40605 states and 50381 transitions. [2021-12-15 22:47:22,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 40605 states and 50381 transitions. [2021-12-15 22:47:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-15 22:47:22,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:22,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:22,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:47:22,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash 108260366, now seen corresponding path program 1 times [2021-12-15 22:47:22,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:22,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800127558] [2021-12-15 22:47:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:22,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-15 22:47:23,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:23,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800127558] [2021-12-15 22:47:23,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800127558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:23,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:23,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:23,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16849799] [2021-12-15 22:47:23,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:23,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:23,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:23,004 INFO L87 Difference]: Start difference. First operand 40605 states and 50381 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:26,394 INFO L93 Difference]: Finished difference Result 110364 states and 137928 transitions. [2021-12-15 22:47:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-12-15 22:47:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:26,482 INFO L225 Difference]: With dead ends: 110364 [2021-12-15 22:47:26,482 INFO L226 Difference]: Without dead ends: 68964 [2021-12-15 22:47:26,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:26,514 INFO L933 BasicCegarLoop]: 1860 mSDtfsCounter, 752 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:26,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 2002 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:47:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68964 states. [2021-12-15 22:47:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68964 to 67356. [2021-12-15 22:47:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67356 states, 67355 states have (on average 1.1751169178234726) internal successors, (79150), 67355 states have internal predecessors, (79150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67356 states to 67356 states and 79150 transitions. [2021-12-15 22:47:27,237 INFO L78 Accepts]: Start accepts. Automaton has 67356 states and 79150 transitions. Word has length 334 [2021-12-15 22:47:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:27,238 INFO L470 AbstractCegarLoop]: Abstraction has 67356 states and 79150 transitions. [2021-12-15 22:47:27,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:27,238 INFO L276 IsEmpty]: Start isEmpty. Operand 67356 states and 79150 transitions. [2021-12-15 22:47:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-12-15 22:47:27,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:27,242 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:27,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:47:27,242 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 196849213, now seen corresponding path program 1 times [2021-12-15 22:47:27,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:27,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103548151] [2021-12-15 22:47:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:27,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-15 22:47:27,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103548151] [2021-12-15 22:47:27,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103548151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:27,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:27,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:27,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821036795] [2021-12-15 22:47:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:27,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:27,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:27,541 INFO L87 Difference]: Start difference. First operand 67356 states and 79150 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:30,880 INFO L93 Difference]: Finished difference Result 157542 states and 188641 transitions. [2021-12-15 22:47:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:30,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 337 [2021-12-15 22:47:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:30,987 INFO L225 Difference]: With dead ends: 157542 [2021-12-15 22:47:30,988 INFO L226 Difference]: Without dead ends: 90975 [2021-12-15 22:47:31,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:31,012 INFO L933 BasicCegarLoop]: 1640 mSDtfsCounter, 861 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:31,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1727 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:47:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90975 states. [2021-12-15 22:47:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90975 to 89387. [2021-12-15 22:47:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89387 states, 89386 states have (on average 1.183384422616517) internal successors, (105778), 89386 states have internal predecessors, (105778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89387 states to 89387 states and 105778 transitions. [2021-12-15 22:47:32,043 INFO L78 Accepts]: Start accepts. Automaton has 89387 states and 105778 transitions. Word has length 337 [2021-12-15 22:47:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:32,043 INFO L470 AbstractCegarLoop]: Abstraction has 89387 states and 105778 transitions. [2021-12-15 22:47:32,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 89387 states and 105778 transitions. [2021-12-15 22:47:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-15 22:47:32,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:32,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:32,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:47:32,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:32,053 INFO L85 PathProgramCache]: Analyzing trace with hash -471969901, now seen corresponding path program 1 times [2021-12-15 22:47:32,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:32,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312118530] [2021-12-15 22:47:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:32,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:47:32,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312118530] [2021-12-15 22:47:32,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312118530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:32,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:32,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:32,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307652478] [2021-12-15 22:47:32,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:32,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:32,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:32,164 INFO L87 Difference]: Start difference. First operand 89387 states and 105778 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:35,134 INFO L93 Difference]: Finished difference Result 177984 states and 210762 transitions. [2021-12-15 22:47:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 367 [2021-12-15 22:47:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:35,232 INFO L225 Difference]: With dead ends: 177984 [2021-12-15 22:47:35,232 INFO L226 Difference]: Without dead ends: 89386 [2021-12-15 22:47:35,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:35,268 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 1152 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:35,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1427 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:47:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89386 states. [2021-12-15 22:47:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89386 to 89384. [2021-12-15 22:47:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89384 states, 89383 states have (on average 1.1360213910922659) internal successors, (101541), 89383 states have internal predecessors, (101541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89384 states to 89384 states and 101541 transitions. [2021-12-15 22:47:36,156 INFO L78 Accepts]: Start accepts. Automaton has 89384 states and 101541 transitions. Word has length 367 [2021-12-15 22:47:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:36,156 INFO L470 AbstractCegarLoop]: Abstraction has 89384 states and 101541 transitions. [2021-12-15 22:47:36,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 89384 states and 101541 transitions. [2021-12-15 22:47:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-12-15 22:47:36,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:36,162 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:47:36,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash -26732311, now seen corresponding path program 1 times [2021-12-15 22:47:36,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:36,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225587616] [2021-12-15 22:47:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:36,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 575 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-15 22:47:36,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225587616] [2021-12-15 22:47:36,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225587616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:36,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:36,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:36,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176085386] [2021-12-15 22:47:36,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:36,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:36,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:36,441 INFO L87 Difference]: Start difference. First operand 89384 states and 101541 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:39,572 INFO L93 Difference]: Finished difference Result 205532 states and 233618 transitions. [2021-12-15 22:47:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 419 [2021-12-15 22:47:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:39,731 INFO L225 Difference]: With dead ends: 205532 [2021-12-15 22:47:39,731 INFO L226 Difference]: Without dead ends: 116937 [2021-12-15 22:47:39,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:39,788 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 949 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:39,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 725 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:47:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116937 states. [2021-12-15 22:47:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116937 to 115342. [2021-12-15 22:47:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115342 states, 115341 states have (on average 1.1030509532603323) internal successors, (127227), 115341 states have internal predecessors, (127227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115342 states to 115342 states and 127227 transitions. [2021-12-15 22:47:41,214 INFO L78 Accepts]: Start accepts. Automaton has 115342 states and 127227 transitions. Word has length 419 [2021-12-15 22:47:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:41,215 INFO L470 AbstractCegarLoop]: Abstraction has 115342 states and 127227 transitions. [2021-12-15 22:47:41,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 115342 states and 127227 transitions. [2021-12-15 22:47:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-12-15 22:47:41,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:41,223 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:41,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:47:41,223 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1008979966, now seen corresponding path program 1 times [2021-12-15 22:47:41,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103934766] [2021-12-15 22:47:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:41,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 404 proven. 110 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-15 22:47:41,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:41,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103934766] [2021-12-15 22:47:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103934766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:47:41,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246169582] [2021-12-15 22:47:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:41,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:47:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:47:41,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:47:41,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:47:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:47:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:47:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-15 22:47:42,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:47:42,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246169582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:42,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:47:42,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 22:47:42,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739475609] [2021-12-15 22:47:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:42,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:42,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:42,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:47:42,719 INFO L87 Difference]: Start difference. First operand 115342 states and 127227 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)