./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_password_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-examples/standard_password_ground.i -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 3cb77685c99da394e56759788276300560cc521e5b9b98850714a1baff20c383 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:09:59,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:09:59,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:09:59,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:09:59,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:09:59,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:09:59,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:09:59,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:09:59,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:09:59,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:09:59,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:09:59,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:09:59,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:09:59,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:09:59,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:09:59,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:09:59,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:09:59,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:09:59,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:09:59,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:09:59,430 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:09:59,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:09:59,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:09:59,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:09:59,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:09:59,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:09:59,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:09:59,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:09:59,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:09:59,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:09:59,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:09:59,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:09:59,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:09:59,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:09:59,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:09:59,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:09:59,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:09:59,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:09:59,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:09:59,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:09:59,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:09:59,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:09:59,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:09:59,456 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:09:59,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:09:59,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:09:59,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:09:59,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:09:59,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:09:59,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:09:59,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:09:59,458 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:09:59,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:09:59,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:09:59,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:09:59,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:09:59,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:09:59,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:09:59,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:09:59,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:09:59,460 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:09:59,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:09:59,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:09:59,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:09:59,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:09:59,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:09:59,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:09:59,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:09:59,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:09:59,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:09:59,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:09:59,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:09:59,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:09:59,462 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:09:59,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:09:59,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:09:59,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cb77685c99da394e56759788276300560cc521e5b9b98850714a1baff20c383 [2022-07-19 09:09:59,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:09:59,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:09:59,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:09:59,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:09:59,650 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:09:59,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_password_ground.i [2022-07-19 09:09:59,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbdd4a81a/8814171564a24d9abbe3c81badf96d0e/FLAG1e1bca5be [2022-07-19 09:10:00,045 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:10:00,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_password_ground.i [2022-07-19 09:10:00,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbdd4a81a/8814171564a24d9abbe3c81badf96d0e/FLAG1e1bca5be [2022-07-19 09:10:00,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbdd4a81a/8814171564a24d9abbe3c81badf96d0e [2022-07-19 09:10:00,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:10:00,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:10:00,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:10:00,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:10:00,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:10:00,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3ae284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00, skipping insertion in model container [2022-07-19 09:10:00,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:10:00,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:10:00,607 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/array-examples/standard_password_ground.i[817,830] [2022-07-19 09:10:00,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:10:00,620 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:10:00,627 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/array-examples/standard_password_ground.i[817,830] [2022-07-19 09:10:00,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:10:00,639 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:10:00,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00 WrapperNode [2022-07-19 09:10:00,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:10:00,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:10:00,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:10:00,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:10:00,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,659 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2022-07-19 09:10:00,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:10:00,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:10:00,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:10:00,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:10:00,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:10:00,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:10:00,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:10:00,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:10:00,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (1/1) ... [2022-07-19 09:10:00,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:10:00,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:00,697 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) [2022-07-19 09:10:00,729 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 [2022-07-19 09:10:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:10:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:10:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:10:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:10:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:10:00,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:10:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:10:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:10:00,791 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:10:00,792 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:10:00,925 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:10:00,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:10:00,935 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:10:00,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:00 BoogieIcfgContainer [2022-07-19 09:10:00,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:10:00,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:10:00,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:10:00,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:10:00,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:10:00" (1/3) ... [2022-07-19 09:10:00,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30839524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:00, skipping insertion in model container [2022-07-19 09:10:00,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:00" (2/3) ... [2022-07-19 09:10:00,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30839524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:00, skipping insertion in model container [2022-07-19 09:10:00,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:00" (3/3) ... [2022-07-19 09:10:00,956 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2022-07-19 09:10:00,966 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:10:00,966 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:10:01,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:10:01,026 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70129c22, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1dd39c13 [2022-07-19 09:10:01,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:10:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) [2022-07-19 09:10:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 09:10:01,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:01,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:01,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:01,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2006075616, now seen corresponding path program 1 times [2022-07-19 09:10:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:01,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052953764] [2022-07-19 09:10:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:10:01,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052953764] [2022-07-19 09:10:01,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052953764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:10:01,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:10:01,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:10:01,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719889383] [2022-07-19 09:10:01,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:10:01,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:10:01,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:10:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:10:01,243 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-19 09:10:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:01,283 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2022-07-19 09:10:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:10:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-07-19 09:10:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:01,291 INFO L225 Difference]: With dead ends: 39 [2022-07-19 09:10:01,291 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 09:10:01,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:10:01,298 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:01,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:10:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 09:10:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-07-19 09:10:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2022-07-19 09:10:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-19 09:10:01,327 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-07-19 09:10:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:01,327 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-19 09:10:01,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-19 09:10:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-19 09:10:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 09:10:01,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:01,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:01,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:10:01,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash -324076335, now seen corresponding path program 1 times [2022-07-19 09:10:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:01,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749688058] [2022-07-19 09:10:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:10:01,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:01,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749688058] [2022-07-19 09:10:01,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749688058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:01,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885290474] [2022-07-19 09:10:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:01,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:01,425 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) [2022-07-19 09:10:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:10:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:10:01,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:10:01,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:10:01,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885290474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:10:01,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 09:10:01,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 09:10:01,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768552304] [2022-07-19 09:10:01,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:10:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:10:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:10:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:10:01,500 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-19 09:10:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:01,511 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-19 09:10:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:10:01,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-07-19 09:10:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:01,513 INFO L225 Difference]: With dead ends: 27 [2022-07-19 09:10:01,513 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 09:10:01,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:10:01,515 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:01,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:10:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 09:10:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-19 09:10:01,519 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) [2022-07-19 09:10:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-19 09:10:01,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-07-19 09:10:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:01,521 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-19 09:10:01,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-19 09:10:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-19 09:10:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 09:10:01,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:01,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:01,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 09:10:01,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:01,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1450931027, now seen corresponding path program 1 times [2022-07-19 09:10:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101262137] [2022-07-19 09:10:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:01,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:10:01,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101262137] [2022-07-19 09:10:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101262137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858378674] [2022-07-19 09:10:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:01,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:01,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:01,792 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) [2022-07-19 09:10:01,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:10:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:10:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:10:01,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:10:01,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858378674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:01,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:01,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:10:01,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353791231] [2022-07-19 09:10:01,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:01,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:10:01,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:10:01,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:10:01,975 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-07-19 09:10:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:02,027 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-07-19 09:10:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:10:02,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 14 [2022-07-19 09:10:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:02,029 INFO L225 Difference]: With dead ends: 44 [2022-07-19 09:10:02,030 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 09:10:02,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:10:02,032 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:02,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:10:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 09:10:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-19 09:10:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2022-07-19 09:10:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-07-19 09:10:02,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 14 [2022-07-19 09:10:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:02,041 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-07-19 09:10:02,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-07-19 09:10:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-07-19 09:10:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:10:02,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:02,044 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:02,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 09:10:02,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 443135373, now seen corresponding path program 2 times [2022-07-19 09:10:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539224582] [2022-07-19 09:10:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 09:10:02,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:02,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539224582] [2022-07-19 09:10:02,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539224582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528673998] [2022-07-19 09:10:02,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:10:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:02,355 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) [2022-07-19 09:10:02,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:10:02,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:10:02,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 09:10:02,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 09:10:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 09:10:02,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528673998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:02,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:02,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 09:10:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902525109] [2022-07-19 09:10:02,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:10:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:10:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:10:02,487 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2022-07-19 09:10:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:02,548 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-07-19 09:10:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:10:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 29 [2022-07-19 09:10:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:02,550 INFO L225 Difference]: With dead ends: 83 [2022-07-19 09:10:02,550 INFO L226 Difference]: Without dead ends: 62 [2022-07-19 09:10:02,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:10:02,551 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:02,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:10:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-19 09:10:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-19 09:10:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-07-19 09:10:02,557 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 29 [2022-07-19 09:10:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:02,557 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-07-19 09:10:02,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2022-07-19 09:10:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-07-19 09:10:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 09:10:02,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:02,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:02,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:02,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:02,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1764901633, now seen corresponding path program 3 times [2022-07-19 09:10:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260405951] [2022-07-19 09:10:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-19 09:10:03,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260405951] [2022-07-19 09:10:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260405951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002070121] [2022-07-19 09:10:03,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:10:03,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:03,050 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) [2022-07-19 09:10:03,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:10:03,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:10:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:10:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-19 09:10:03,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:03,586 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-19 09:10:03,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-19 09:10:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-19 09:10:03,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002070121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:03,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:03,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 22 [2022-07-19 09:10:03,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457911692] [2022-07-19 09:10:03,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:03,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 09:10:03,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:03,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 09:10:03,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-19 09:10:03,619 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) [2022-07-19 09:10:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:04,029 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-07-19 09:10:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 09:10:04,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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 59 [2022-07-19 09:10:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:04,031 INFO L225 Difference]: With dead ends: 114 [2022-07-19 09:10:04,031 INFO L226 Difference]: Without dead ends: 75 [2022-07-19 09:10:04,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 09:10:04,034 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:04,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 76 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:10:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-19 09:10:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-07-19 09:10:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-19 09:10:04,048 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2022-07-19 09:10:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:04,048 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-19 09:10:04,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) [2022-07-19 09:10:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-19 09:10:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 09:10:04,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:04,052 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:04,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:04,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:04,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:04,261 INFO L85 PathProgramCache]: Analyzing trace with hash -294095331, now seen corresponding path program 1 times [2022-07-19 09:10:04,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:04,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510970713] [2022-07-19 09:10:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-19 09:10:04,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510970713] [2022-07-19 09:10:04,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510970713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781452840] [2022-07-19 09:10:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:04,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:04,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:04,401 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) [2022-07-19 09:10:04,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:10:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 09:10:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-19 09:10:04,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-19 09:10:04,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781452840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:04,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:04,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-19 09:10:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785015293] [2022-07-19 09:10:04,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:04,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 09:10:04,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 09:10:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-19 09:10:04,691 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:04,838 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2022-07-19 09:10:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 09:10:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-19 09:10:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:04,839 INFO L225 Difference]: With dead ends: 178 [2022-07-19 09:10:04,839 INFO L226 Difference]: Without dead ends: 134 [2022-07-19 09:10:04,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-19 09:10:04,840 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:04,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 45 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:10:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-19 09:10:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-19 09:10:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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) [2022-07-19 09:10:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-07-19 09:10:04,848 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 68 [2022-07-19 09:10:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:04,848 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-07-19 09:10:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-07-19 09:10:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-19 09:10:04,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:04,850 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:04,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:05,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1900697445, now seen corresponding path program 2 times [2022-07-19 09:10:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:05,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484031744] [2022-07-19 09:10:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:05,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-07-19 09:10:05,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484031744] [2022-07-19 09:10:05,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484031744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:05,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840595186] [2022-07-19 09:10:05,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:10:05,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:05,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:05,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:05,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:10:05,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:10:05,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:05,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:10:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-07-19 09:10:05,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-07-19 09:10:06,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840595186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:06,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:06,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-19 09:10:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249535113] [2022-07-19 09:10:06,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 09:10:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 09:10:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 09:10:06,155 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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) [2022-07-19 09:10:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:06,492 INFO L93 Difference]: Finished difference Result 347 states and 402 transitions. [2022-07-19 09:10:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 09:10:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 133 [2022-07-19 09:10:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:06,493 INFO L225 Difference]: With dead ends: 347 [2022-07-19 09:10:06,493 INFO L226 Difference]: Without dead ends: 264 [2022-07-19 09:10:06,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 09:10:06,494 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 390 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:06,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 94 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:10:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-19 09:10:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-19 09:10:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 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) [2022-07-19 09:10:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2022-07-19 09:10:06,508 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 133 [2022-07-19 09:10:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:06,509 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2022-07-19 09:10:06,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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) [2022-07-19 09:10:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2022-07-19 09:10:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-19 09:10:06,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:06,511 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:06,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:06,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:06,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 871306471, now seen corresponding path program 3 times [2022-07-19 09:10:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:06,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240598768] [2022-07-19 09:10:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3727 trivial. 0 not checked. [2022-07-19 09:10:07,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:07,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240598768] [2022-07-19 09:10:07,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240598768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:07,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810363683] [2022-07-19 09:10:07,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:10:07,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:07,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:07,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:10:07,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 09:10:07,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:07,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:10:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 5881 trivial. 0 not checked. [2022-07-19 09:10:08,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:09,240 INFO L356 Elim1Store]: treesize reduction 50, result has 48.5 percent of original size [2022-07-19 09:10:09,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 54 [2022-07-19 09:10:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 48 proven. 199 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2022-07-19 09:10:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810363683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:09,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:09,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 10, 9] total 66 [2022-07-19 09:10:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6413860] [2022-07-19 09:10:09,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:09,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 09:10:09,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 09:10:09,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1574, Invalid=2716, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 09:10:09,285 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 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) [2022-07-19 09:10:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:12,183 INFO L93 Difference]: Finished difference Result 440 states and 446 transitions. [2022-07-19 09:10:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-19 09:10:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 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 263 [2022-07-19 09:10:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:12,188 INFO L225 Difference]: With dead ends: 440 [2022-07-19 09:10:12,188 INFO L226 Difference]: Without dead ends: 279 [2022-07-19 09:10:12,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 511 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6378 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8419, Invalid=19637, Unknown=0, NotChecked=0, Total=28056 [2022-07-19 09:10:12,229 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 689 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:12,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 130 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:10:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-19 09:10:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2022-07-19 09:10:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 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) [2022-07-19 09:10:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-07-19 09:10:12,238 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2022-07-19 09:10:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:12,244 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-07-19 09:10:12,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 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) [2022-07-19 09:10:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-07-19 09:10:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-19 09:10:12,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:12,262 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 51, 51, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:12,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:12,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -395551069, now seen corresponding path program 4 times [2022-07-19 09:10:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54636854] [2022-07-19 09:10:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3884 trivial. 0 not checked. [2022-07-19 09:10:13,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54636854] [2022-07-19 09:10:13,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54636854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144954243] [2022-07-19 09:10:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:10:13,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:13,631 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:13,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:10:13,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:10:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:13,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 09:10:13,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2022-07-19 09:10:14,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2022-07-19 09:10:16,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144954243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:16,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:16,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-19 09:10:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79048204] [2022-07-19 09:10:16,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:16,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-19 09:10:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-19 09:10:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-19 09:10:16,175 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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) [2022-07-19 09:10:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:17,076 INFO L93 Difference]: Finished difference Result 706 states and 815 transitions. [2022-07-19 09:10:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-19 09:10:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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 272 [2022-07-19 09:10:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:17,079 INFO L225 Difference]: With dead ends: 706 [2022-07-19 09:10:17,079 INFO L226 Difference]: Without dead ends: 538 [2022-07-19 09:10:17,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-19 09:10:17,082 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 629 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:17,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 140 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 09:10:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-07-19 09:10:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-07-19 09:10:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.005586592178771) internal successors, (540), 537 states have internal predecessors, (540), 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) [2022-07-19 09:10:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 540 transitions. [2022-07-19 09:10:17,094 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 540 transitions. Word has length 272 [2022-07-19 09:10:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:17,095 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 540 transitions. [2022-07-19 09:10:17,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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) [2022-07-19 09:10:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 540 transitions. [2022-07-19 09:10:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-07-19 09:10:17,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:17,101 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 104, 104, 104, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:17,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 09:10:17,312 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash 129474353, now seen corresponding path program 5 times [2022-07-19 09:10:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:17,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767509970] [2022-07-19 09:10:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 26996 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 16180 trivial. 0 not checked. [2022-07-19 09:10:20,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767509970] [2022-07-19 09:10:20,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767509970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611731834] [2022-07-19 09:10:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:10:20,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:20,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:20,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process