./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/invert_string-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/invert_string-1.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 b3da85103e65fd13a584e838d8b961878044a0a70e09ad1788e3ca53a404f357 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:48:24,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:48:24,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:48:24,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:48:24,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:48:24,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:48:24,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:48:24,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:48:24,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:48:24,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:48:24,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:48:24,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:48:24,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:48:24,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:48:24,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:48:24,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:48:24,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:48:24,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:48:24,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:48:24,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:48:24,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:48:24,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:48:24,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:48:24,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:48:24,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:48:24,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:48:24,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:48:24,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:48:24,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:48:24,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:48:24,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:48:24,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:48:24,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:48:24,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:48:24,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:48:24,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:48:24,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:48:24,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:48:24,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:48:24,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:48:24,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:48:24,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:48:24,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:48:24,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:48:24,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:48:24,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:48:24,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:48:24,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:48:24,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:48:24,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:48:24,536 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:48:24,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:48:24,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:48:24,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:48:24,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:48:24,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:48:24,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:48:24,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:48:24,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:48:24,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:48:24,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:48:24,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:48:24,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:48:24,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:48:24,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:48:24,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:48:24,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:48:24,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:48:24,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:48:24,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:48:24,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:48:24,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:48:24,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:48:24,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:48:24,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:48:24,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:48:24,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3da85103e65fd13a584e838d8b961878044a0a70e09ad1788e3ca53a404f357 [2021-12-15 10:48:24,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:48:24,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:48:24,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:48:24,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:48:24,771 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:48:24,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/invert_string-1.c [2021-12-15 10:48:24,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193d9d87f/dfe8494edabd4eb1bc5ea457fad0d406/FLAG9cd447e60 [2021-12-15 10:48:25,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:48:25,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-1.c [2021-12-15 10:48:25,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193d9d87f/dfe8494edabd4eb1bc5ea457fad0d406/FLAG9cd447e60 [2021-12-15 10:48:25,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193d9d87f/dfe8494edabd4eb1bc5ea457fad0d406 [2021-12-15 10:48:25,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:48:25,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:48:25,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:48:25,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:48:25,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:48:25,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507da9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25, skipping insertion in model container [2021-12-15 10:48:25,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:48:25,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:48:25,362 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/loops/invert_string-1.c[352,365] [2021-12-15 10:48:25,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:48:25,383 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:48:25,393 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/loops/invert_string-1.c[352,365] [2021-12-15 10:48:25,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:48:25,415 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:48:25,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25 WrapperNode [2021-12-15 10:48:25,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:48:25,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:48:25,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:48:25,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:48:25,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,445 INFO L137 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2021-12-15 10:48:25,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:48:25,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:48:25,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:48:25,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:48:25,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:48:25,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:48:25,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:48:25,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:48:25,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (1/1) ... [2021-12-15 10:48:25,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:48:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:25,517 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 10:48:25,523 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 10:48:25,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:48:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:48:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 10:48:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 10:48:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:48:25,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:48:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 10:48:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 10:48:25,597 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:48:25,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:48:25,736 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:48:25,756 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:48:25,756 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 10:48:25,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:25 BoogieIcfgContainer [2021-12-15 10:48:25,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:48:25,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:48:25,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:48:25,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:48:25,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:48:25" (1/3) ... [2021-12-15 10:48:25,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf4fde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:48:25, skipping insertion in model container [2021-12-15 10:48:25,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:25" (2/3) ... [2021-12-15 10:48:25,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf4fde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:48:25, skipping insertion in model container [2021-12-15 10:48:25,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:25" (3/3) ... [2021-12-15 10:48:25,768 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2021-12-15 10:48:25,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:48:25,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:48:25,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:48:25,815 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 10:48:25,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:48:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 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 10:48:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 10:48:25,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:25,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:25,839 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -56209308, now seen corresponding path program 1 times [2021-12-15 10:48:25,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553468664] [2021-12-15 10:48:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:25,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:25,966 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 10:48:25,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553468664] [2021-12-15 10:48:25,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553468664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:48:25,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:48:25,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:48:25,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815051225] [2021-12-15 10:48:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:48:25,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:48:25,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:26,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:48:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:48:26,010 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 10:48:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:26,024 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-12-15 10:48:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:48:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-15 10:48:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:26,035 INFO L225 Difference]: With dead ends: 37 [2021-12-15 10:48:26,035 INFO L226 Difference]: Without dead ends: 16 [2021-12-15 10:48:26,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:48:26,042 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:26,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:48:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-15 10:48:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-15 10:48:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 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 10:48:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-15 10:48:26,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-12-15 10:48:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-15 10:48:26,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 10:48:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-15 10:48:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 10:48:26,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:26,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:26,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:48:26,078 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -411746854, now seen corresponding path program 1 times [2021-12-15 10:48:26,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747988736] [2021-12-15 10:48:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:26,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:26,215 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 10:48:26,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:26,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747988736] [2021-12-15 10:48:26,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747988736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:48:26,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:48:26,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:48:26,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702922050] [2021-12-15 10:48:26,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:48:26,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:48:26,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:48:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:48:26,219 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 10:48:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:26,253 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-15 10:48:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:48:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-15 10:48:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:26,255 INFO L225 Difference]: With dead ends: 34 [2021-12-15 10:48:26,255 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 10:48:26,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:48:26,260 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:26,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 16 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:48:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 10:48:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2021-12-15 10:48:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 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 10:48:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-15 10:48:26,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-12-15 10:48:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:26,273 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-15 10:48:26,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 10:48:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-15 10:48:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 10:48:26,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:26,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:26,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:48:26,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1790951096, now seen corresponding path program 1 times [2021-12-15 10:48:26,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:26,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90658299] [2021-12-15 10:48:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:26,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:48:26,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90658299] [2021-12-15 10:48:26,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90658299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:48:26,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:48:26,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:48:26,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765049823] [2021-12-15 10:48:26,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:48:26,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:48:26,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:48:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:48:26,366 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 10:48:26,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:26,406 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-15 10:48:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:48:26,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-15 10:48:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:26,408 INFO L225 Difference]: With dead ends: 25 [2021-12-15 10:48:26,408 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 10:48:26,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:48:26,411 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:26,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:48:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 10:48:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-15 10:48:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:48:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-12-15 10:48:26,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-12-15 10:48:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:26,419 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-12-15 10:48:26,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 10:48:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-12-15 10:48:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:48:26,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:26,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:26,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:48:26,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash 467501014, now seen corresponding path program 1 times [2021-12-15 10:48:26,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:26,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421407046] [2021-12-15 10:48:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:26,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:26,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421407046] [2021-12-15 10:48:26,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421407046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224269659] [2021-12-15 10:48:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:26,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:26,835 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 10:48:26,838 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 10:48:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 10:48:26,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 10:48:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-12-15 10:48:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:27,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:27,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:27,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-12-15 10:48:27,292 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-15 10:48:27,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-12-15 10:48:27,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-15 10:48:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:27,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224269659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:27,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:27,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2021-12-15 10:48:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611287047] [2021-12-15 10:48:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:27,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 10:48:27,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 10:48:27,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:48:27,505 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 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 10:48:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:28,090 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-12-15 10:48:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 10:48:28,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2021-12-15 10:48:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:28,091 INFO L225 Difference]: With dead ends: 47 [2021-12-15 10:48:28,092 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 10:48:28,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:48:28,093 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 103 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:28,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 54 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:48:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 10:48:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2021-12-15 10:48:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 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 10:48:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-15 10:48:28,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2021-12-15 10:48:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:28,100 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-15 10:48:28,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 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 10:48:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-15 10:48:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 10:48:28,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:28,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:28,130 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 10:48:28,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:28,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash 35676596, now seen corresponding path program 2 times [2021-12-15 10:48:28,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:28,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869313553] [2021-12-15 10:48:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:28,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:28,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869313553] [2021-12-15 10:48:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869313553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006489621] [2021-12-15 10:48:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:48:28,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:28,404 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 10:48:28,406 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 10:48:28,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:48:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:28,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:48:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:28,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:28,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006489621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:28,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:28,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2021-12-15 10:48:28,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701291893] [2021-12-15 10:48:28,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:28,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 10:48:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 10:48:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:48:28,558 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:48:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:28,639 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-12-15 10:48:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 10:48:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 17 [2021-12-15 10:48:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:28,641 INFO L225 Difference]: With dead ends: 45 [2021-12-15 10:48:28,641 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 10:48:28,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:48:28,642 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:28,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:48:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 10:48:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-12-15 10:48:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 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 10:48:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-15 10:48:28,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-12-15 10:48:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:28,647 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-15 10:48:28,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:48:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-15 10:48:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 10:48:28,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:28,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:28,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:28,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:28,857 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1570853842, now seen corresponding path program 3 times [2021-12-15 10:48:28,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698760523] [2021-12-15 10:48:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:28,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:29,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:29,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698760523] [2021-12-15 10:48:29,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698760523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416812621] [2021-12-15 10:48:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:48:29,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:29,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:48:29,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:48:29,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 10:48:29,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 10:48:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:29,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 10:48:29,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:48:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-15 10:48:29,657 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-15 10:48:29,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 23 [2021-12-15 10:48:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:29,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:30,225 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#str2~0#1.offset| Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#str2~0#1.base|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~#str2~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#str1~0#1.base|) |c_ULTIMATE.start_main_~#str1~0#1.offset|)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#str2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#str1~0#1.base|) |c_ULTIMATE.start_main_~#str1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~MAX~0#1| |ULTIMATE.start_main_~#str2~0#1.offset| (- 1)))))) is different from false [2021-12-15 10:48:30,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 108 [2021-12-15 10:48:30,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:30,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 179 [2021-12-15 10:48:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-15 10:48:30,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416812621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:30,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:30,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2021-12-15 10:48:30,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906813654] [2021-12-15 10:48:30,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:30,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 10:48:30,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 10:48:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=743, Unknown=1, NotChecked=56, Total=930 [2021-12-15 10:48:30,457 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 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 10:48:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:33,617 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-12-15 10:48:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-15 10:48:33,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 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 19 [2021-12-15 10:48:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:33,618 INFO L225 Difference]: With dead ends: 72 [2021-12-15 10:48:33,618 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 10:48:33,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=527, Invalid=2232, Unknown=1, NotChecked=102, Total=2862 [2021-12-15 10:48:33,620 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:33,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 182 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 521 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2021-12-15 10:48:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 10:48:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 34. [2021-12-15 10:48:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 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 10:48:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-15 10:48:33,627 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2021-12-15 10:48:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:33,627 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-15 10:48:33,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 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 10:48:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-15 10:48:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 10:48:33,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:33,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:33,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 10:48:33,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:33,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash -138053268, now seen corresponding path program 1 times [2021-12-15 10:48:33,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:33,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600976910] [2021-12-15 10:48:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:33,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:48:33,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600976910] [2021-12-15 10:48:33,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600976910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:33,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952649477] [2021-12-15 10:48:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:33,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:33,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:48:33,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:48:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:33,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:48:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:48:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:48:34,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952649477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:34,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:34,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 10:48:34,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185342418] [2021-12-15 10:48:34,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:34,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 10:48:34,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 10:48:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:48:34,063 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 10:48:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:34,154 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-12-15 10:48:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 10:48:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 19 [2021-12-15 10:48:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:34,155 INFO L225 Difference]: With dead ends: 61 [2021-12-15 10:48:34,155 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 10:48:34,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-15 10:48:34,157 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 43 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:48:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 10:48:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-12-15 10:48:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 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 10:48:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-15 10:48:34,163 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2021-12-15 10:48:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:34,163 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-15 10:48:34,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 10:48:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-15 10:48:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 10:48:34,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:34,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:34,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:34,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:34,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1044113744, now seen corresponding path program 4 times [2021-12-15 10:48:34,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356686518] [2021-12-15 10:48:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:34,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:34,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356686518] [2021-12-15 10:48:34,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356686518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772769515] [2021-12-15 10:48:34,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:48:34,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:34,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:34,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:48:34,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:48:34,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:48:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:34,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 10:48:34,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:34,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 10:48:34,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-15 10:48:34,773 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-15 10:48:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 23 [2021-12-15 10:48:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 10:48:34,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:34,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:34,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-12-15 10:48:34,896 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-15 10:48:34,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-12-15 10:48:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-15 10:48:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 10:48:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772769515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:34,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:34,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 23 [2021-12-15 10:48:34,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081528279] [2021-12-15 10:48:34,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:34,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 10:48:34,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 10:48:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-12-15 10:48:34,987 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 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 10:48:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:36,387 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-12-15 10:48:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-15 10:48:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 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 21 [2021-12-15 10:48:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:36,389 INFO L225 Difference]: With dead ends: 110 [2021-12-15 10:48:36,389 INFO L226 Difference]: Without dead ends: 100 [2021-12-15 10:48:36,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=3969, Unknown=0, NotChecked=0, Total=4830 [2021-12-15 10:48:36,391 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:36,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 174 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 10:48:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-15 10:48:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 46. [2021-12-15 10:48:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 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 10:48:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-15 10:48:36,405 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2021-12-15 10:48:36,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:36,405 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-15 10:48:36,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 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 10:48:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-15 10:48:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:48:36,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:36,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:36,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:36,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:36,630 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1262940008, now seen corresponding path program 2 times [2021-12-15 10:48:36,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:36,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71332470] [2021-12-15 10:48:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:36,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:48:36,655 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 10:48:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:48:36,697 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 10:48:36,697 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 10:48:36,698 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 10:48:36,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 10:48:36,702 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1] [2021-12-15 10:48:36,705 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 10:48:36,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:48:36 BoogieIcfgContainer [2021-12-15 10:48:36,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 10:48:36,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 10:48:36,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 10:48:36,731 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 10:48:36,732 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:25" (3/4) ... [2021-12-15 10:48:36,733 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-15 10:48:36,770 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-15 10:48:36,770 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 10:48:36,770 INFO L158 Benchmark]: Toolchain (without parser) took 11566.27ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 56.8MB in the beginning and 70.2MB in the end (delta: -13.4MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,771 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory was 45.1MB in the beginning and 45.0MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:48:36,771 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.18ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 56.5MB in the beginning and 84.4MB in the end (delta: -27.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,771 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.36ms. Allocated memory is still 109.1MB. Free memory was 84.4MB in the beginning and 82.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,772 INFO L158 Benchmark]: Boogie Preprocessor took 40.32ms. Allocated memory is still 109.1MB. Free memory was 82.5MB in the beginning and 81.7MB in the end (delta: 838.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,772 INFO L158 Benchmark]: RCFGBuilder took 268.72ms. Allocated memory is still 109.1MB. Free memory was 81.7MB in the beginning and 71.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,772 INFO L158 Benchmark]: TraceAbstraction took 10971.26ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 71.2MB in the beginning and 73.3MB in the end (delta: -2.2MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,773 INFO L158 Benchmark]: Witness Printer took 39.03ms. Allocated memory is still 132.1MB. Free memory was 73.3MB in the beginning and 70.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:48:36,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory was 45.1MB in the beginning and 45.0MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.18ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 56.5MB in the beginning and 84.4MB in the end (delta: -27.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.36ms. Allocated memory is still 109.1MB. Free memory was 84.4MB in the beginning and 82.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.32ms. Allocated memory is still 109.1MB. Free memory was 82.5MB in the beginning and 81.7MB in the end (delta: 838.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 268.72ms. Allocated memory is still 109.1MB. Free memory was 81.7MB in the beginning and 71.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10971.26ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 71.2MB in the beginning and 73.3MB in the end (delta: -2.2MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. * Witness Printer took 39.03ms. Allocated memory is still 132.1MB. Free memory was 73.3MB in the beginning and 70.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) VAL [MAX=2] [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 VAL [cont=0, i=0, MAX=2, str1={4:0}, str2={5:0}] [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ VAL [cont=0, i=1, j=1, MAX=2, str1={4:0}, str2={5:0}] [L29] i-- VAL [cont=0, i=0, j=1, MAX=2, str1={4:0}, str2={5:0}] [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ VAL [cont=0, i=0, j=2, MAX=2, str1={4:0}, str2={5:0}] [L29] i-- VAL [cont=0, i=-1, j=2, MAX=2, str1={4:0}, str2={5:0}] [L29] COND FALSE !(i >= 0) VAL [cont=0, i=-1, j=2, MAX=2, str1={4:0}, str2={5:0}] [L34] j = MAX-1 [L35] i=0 VAL [cont=0, i=0, j=1, MAX=2, str1={4:0}, str2={5:0}] [L35] COND TRUE i