./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/byte_add_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/bitvector/byte_add_1-1.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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:44:18,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:44:18,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:44:18,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:44:18,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:44:18,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:44:18,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:44:18,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:44:18,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:44:18,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:44:18,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:44:18,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:44:18,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:44:18,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:44:18,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:44:18,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:44:18,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:44:18,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:44:18,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:44:18,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:44:18,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:44:18,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:44:18,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:44:18,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:44:18,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:44:18,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:44:18,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:44:18,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:44:18,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:44:18,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:44:18,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:44:18,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:44:18,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:44:18,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:44:18,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:44:18,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:44:18,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:44:18,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:44:18,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:44:18,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:44:18,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:44:18,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:44:18,579 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:44:18,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:44:18,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:44:18,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:44:18,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:44:18,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:44:18,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:44:18,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:44:18,582 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:44:18,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:44:18,582 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:44:18,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:44:18,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:44:18,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:44:18,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:44:18,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:44:18,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:44:18,583 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:44:18,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:44:18,584 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:44:18,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:44:18,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:44:18,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:44:18,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:44:18,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:44:18,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:44:18,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:44:18,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:44:18,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:44:18,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:44:18,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:44:18,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:44:18,586 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:44:18,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:44:18,586 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:44:18,587 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2023-02-14 10:44:18,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:44:18,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:44:18,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:44:18,810 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:44:18,810 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:44:18,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add_1-1.i [2023-02-14 10:44:19,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:44:20,067 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:44:20,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_1-1.i [2023-02-14 10:44:20,073 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b4bf6b1/4430e8a6839b4959b41c9abb0674c3ec/FLAG7c696bfd4 [2023-02-14 10:44:20,084 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b4bf6b1/4430e8a6839b4959b41c9abb0674c3ec [2023-02-14 10:44:20,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:44:20,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:44:20,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:44:20,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:44:20,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:44:20,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f56848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20, skipping insertion in model container [2023-02-14 10:44:20,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:44:20,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:44:20,243 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2023-02-14 10:44:20,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:44:20,280 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:44:20,289 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2023-02-14 10:44:20,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:44:20,325 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:44:20,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20 WrapperNode [2023-02-14 10:44:20,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:44:20,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:44:20,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:44:20,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:44:20,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,386 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-02-14 10:44:20,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:44:20,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:44:20,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:44:20,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:44:20,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,419 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:44:20,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:44:20,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:44:20,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:44:20,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (1/1) ... [2023-02-14 10:44:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:44:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:20,466 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) [2023-02-14 10:44:20,487 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 [2023-02-14 10:44:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:44:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:44:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:44:20,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:44:20,567 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:44:20,569 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:44:20,877 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:44:20,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:44:20,889 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 10:44:20,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:44:20 BoogieIcfgContainer [2023-02-14 10:44:20,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:44:20,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:44:20,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:44:20,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:44:20,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:44:20" (1/3) ... [2023-02-14 10:44:20,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143d6f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:44:20, skipping insertion in model container [2023-02-14 10:44:20,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:20" (2/3) ... [2023-02-14 10:44:20,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143d6f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:44:20, skipping insertion in model container [2023-02-14 10:44:20,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:44:20" (3/3) ... [2023-02-14 10:44:20,896 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2023-02-14 10:44:20,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:44:20,910 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:44:20,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:44:20,951 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53afaa39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:44:20,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:44:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 46 states have internal predecessors, (80), 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) [2023-02-14 10:44:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 10:44:20,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:20,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:20,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 903950584, now seen corresponding path program 1 times [2023-02-14 10:44:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243452455] [2023-02-14 10:44:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:21,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243452455] [2023-02-14 10:44:21,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243452455] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:21,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:21,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:44:21,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936692971] [2023-02-14 10:44:21,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:21,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:44:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:44:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:44:21,237 INFO L87 Difference]: Start difference. First operand has 47 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 46 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:21,252 INFO L93 Difference]: Finished difference Result 64 states and 105 transitions. [2023-02-14 10:44:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:44:21,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 10:44:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:21,262 INFO L225 Difference]: With dead ends: 64 [2023-02-14 10:44:21,262 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 10:44:21,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:44:21,267 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:21,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:44:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 10:44:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-14 10:44:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 73 transitions. [2023-02-14 10:44:21,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 73 transitions. Word has length 13 [2023-02-14 10:44:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:21,305 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 73 transitions. [2023-02-14 10:44:21,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 73 transitions. [2023-02-14 10:44:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 10:44:21,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:21,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:21,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:44:21,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 430337229, now seen corresponding path program 1 times [2023-02-14 10:44:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960728933] [2023-02-14 10:44:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:21,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960728933] [2023-02-14 10:44:21,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960728933] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:21,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:21,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:44:21,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140148180] [2023-02-14 10:44:21,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:44:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:44:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:44:21,564 INFO L87 Difference]: Start difference. First operand 43 states and 73 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:21,676 INFO L93 Difference]: Finished difference Result 102 states and 179 transitions. [2023-02-14 10:44:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:44:21,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 10:44:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:21,681 INFO L225 Difference]: With dead ends: 102 [2023-02-14 10:44:21,681 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 10:44:21,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:44:21,690 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:21,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 77 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 10:44:21,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-02-14 10:44:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 66 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 103 transitions. [2023-02-14 10:44:21,707 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 103 transitions. Word has length 13 [2023-02-14 10:44:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:21,707 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 103 transitions. [2023-02-14 10:44:21,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 103 transitions. [2023-02-14 10:44:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 10:44:21,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:21,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:21,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:44:21,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2037878536, now seen corresponding path program 1 times [2023-02-14 10:44:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:21,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426905873] [2023-02-14 10:44:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:21,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:21,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426905873] [2023-02-14 10:44:21,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426905873] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:21,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:21,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:21,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609140040] [2023-02-14 10:44:21,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:21,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:21,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:21,863 INFO L87 Difference]: Start difference. First operand 67 states and 103 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2023-02-14 10:44:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:22,042 INFO L93 Difference]: Finished difference Result 168 states and 287 transitions. [2023-02-14 10:44:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:44:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) Word has length 19 [2023-02-14 10:44:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:22,044 INFO L225 Difference]: With dead ends: 168 [2023-02-14 10:44:22,044 INFO L226 Difference]: Without dead ends: 135 [2023-02-14 10:44:22,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:22,046 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:22,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 105 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:44:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-14 10:44:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2023-02-14 10:44:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 92 states have internal predecessors, (143), 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) [2023-02-14 10:44:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 143 transitions. [2023-02-14 10:44:22,056 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 143 transitions. Word has length 19 [2023-02-14 10:44:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:22,056 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 143 transitions. [2023-02-14 10:44:22,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2023-02-14 10:44:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 143 transitions. [2023-02-14 10:44:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 10:44:22,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:22,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:22,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 10:44:22,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash -21369817, now seen corresponding path program 1 times [2023-02-14 10:44:22,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552397681] [2023-02-14 10:44:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:44:22,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:22,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552397681] [2023-02-14 10:44:22,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552397681] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:22,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:22,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259538672] [2023-02-14 10:44:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:22,217 INFO L87 Difference]: Start difference. First operand 93 states and 143 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2023-02-14 10:44:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:22,379 INFO L93 Difference]: Finished difference Result 272 states and 412 transitions. [2023-02-14 10:44:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:44:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 25 [2023-02-14 10:44:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:22,384 INFO L225 Difference]: With dead ends: 272 [2023-02-14 10:44:22,385 INFO L226 Difference]: Without dead ends: 192 [2023-02-14 10:44:22,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:22,391 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 105 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:22,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 201 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-14 10:44:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 101. [2023-02-14 10:44:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.52) internal successors, (152), 100 states have internal predecessors, (152), 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) [2023-02-14 10:44:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 152 transitions. [2023-02-14 10:44:22,404 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 152 transitions. Word has length 25 [2023-02-14 10:44:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:22,404 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 152 transitions. [2023-02-14 10:44:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2023-02-14 10:44:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 152 transitions. [2023-02-14 10:44:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 10:44:22,409 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:22,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 10:44:22,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -53067146, now seen corresponding path program 1 times [2023-02-14 10:44:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738798334] [2023-02-14 10:44:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:44:22,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738798334] [2023-02-14 10:44:22,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738798334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:22,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:22,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717893722] [2023-02-14 10:44:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:22,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:22,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:22,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:22,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:22,569 INFO L87 Difference]: Start difference. First operand 101 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-02-14 10:44:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:22,720 INFO L93 Difference]: Finished difference Result 293 states and 438 transitions. [2023-02-14 10:44:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:44:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 26 [2023-02-14 10:44:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:22,722 INFO L225 Difference]: With dead ends: 293 [2023-02-14 10:44:22,722 INFO L226 Difference]: Without dead ends: 212 [2023-02-14 10:44:22,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:22,724 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 109 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:22,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-14 10:44:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 111. [2023-02-14 10:44:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.5) internal successors, (165), 110 states have internal predecessors, (165), 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) [2023-02-14 10:44:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 165 transitions. [2023-02-14 10:44:22,749 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 165 transitions. Word has length 26 [2023-02-14 10:44:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:22,752 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 165 transitions. [2023-02-14 10:44:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-02-14 10:44:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 165 transitions. [2023-02-14 10:44:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 10:44:22,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:22,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:22,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 10:44:22,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1351948728, now seen corresponding path program 1 times [2023-02-14 10:44:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511260369] [2023-02-14 10:44:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:44:22,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:22,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511260369] [2023-02-14 10:44:22,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511260369] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:22,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:22,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:44:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100007420] [2023-02-14 10:44:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:44:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:44:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:44:22,886 INFO L87 Difference]: Start difference. First operand 111 states and 165 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-02-14 10:44:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:22,893 INFO L93 Difference]: Finished difference Result 195 states and 291 transitions. [2023-02-14 10:44:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:44:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 27 [2023-02-14 10:44:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:22,894 INFO L225 Difference]: With dead ends: 195 [2023-02-14 10:44:22,894 INFO L226 Difference]: Without dead ends: 97 [2023-02-14 10:44:22,896 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 [2023-02-14 10:44:22,897 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 66 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 67 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 [2023-02-14 10:44:22,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 67 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:44:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-14 10:44:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-14 10:44:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4791666666666667) internal successors, (142), 96 states have internal predecessors, (142), 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) [2023-02-14 10:44:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2023-02-14 10:44:22,910 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 27 [2023-02-14 10:44:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:22,910 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2023-02-14 10:44:22,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-02-14 10:44:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2023-02-14 10:44:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 10:44:22,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:22,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 10:44:22,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1405004212, now seen corresponding path program 1 times [2023-02-14 10:44:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:22,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683453224] [2023-02-14 10:44:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:22,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 10:44:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683453224] [2023-02-14 10:44:23,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683453224] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:23,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:23,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:23,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596820579] [2023-02-14 10:44:23,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:23,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:23,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:23,037 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2023-02-14 10:44:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:23,193 INFO L93 Difference]: Finished difference Result 273 states and 427 transitions. [2023-02-14 10:44:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:44:23,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 33 [2023-02-14 10:44:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:23,195 INFO L225 Difference]: With dead ends: 273 [2023-02-14 10:44:23,195 INFO L226 Difference]: Without dead ends: 195 [2023-02-14 10:44:23,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:23,197 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:23,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 86 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-02-14 10:44:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 136. [2023-02-14 10:44:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5333333333333334) internal successors, (207), 135 states have internal predecessors, (207), 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) [2023-02-14 10:44:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 207 transitions. [2023-02-14 10:44:23,208 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 207 transitions. Word has length 33 [2023-02-14 10:44:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:23,208 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 207 transitions. [2023-02-14 10:44:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2023-02-14 10:44:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 207 transitions. [2023-02-14 10:44:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 10:44:23,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:23,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 10:44:23,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2122077153, now seen corresponding path program 1 times [2023-02-14 10:44:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624000089] [2023-02-14 10:44:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:23,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:44:23,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624000089] [2023-02-14 10:44:23,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624000089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076474605] [2023-02-14 10:44:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:23,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:23,413 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) [2023-02-14 10:44:23,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:44:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 10:44:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates...