./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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.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 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:22:46,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:22:46,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:22:46,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:22:46,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:22:46,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:22:46,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:22:46,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:22:46,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:22:46,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:22:46,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:22:46,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:22:46,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:22:46,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:22:46,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:22:46,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:22:46,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:22:46,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:22:46,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:22:46,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:22:46,575 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:22:46,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:22:46,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:22:46,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:22:46,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:22:46,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:22:46,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:22:46,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:22:46,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:22:46,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:22:46,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:22:46,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:22:46,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:22:46,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:22:46,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:22:46,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:22:46,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:22:46,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:22:46,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:22:46,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:22:46,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:22:46,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:22:46,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:22:46,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:22:46,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:22:46,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:22:46,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:22:46,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:22:46,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:22:46,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:22:46,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:22:46,628 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:22:46,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:22:46,629 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:22:46,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:22:46,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:22:46,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:22:46,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:22:46,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:22:46,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:22:46,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:22:46,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:22:46,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:22:46,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:22:46,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:22:46,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:22:46,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:22:46,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:22:46,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:22:46,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:22:46,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:22:46,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:22:46,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:22:46,633 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:22:46,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:22:46,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:22:46,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2022-07-13 11:22:46,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:22:46,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:22:46,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:22:46,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:22:46,844 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:22:46,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add-1.i [2022-07-13 11:22:46,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c067174b9/1a1716333255449ea880d2a7b90ef857/FLAG72b00f1b5 [2022-07-13 11:22:47,327 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:22:47,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i [2022-07-13 11:22:47,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c067174b9/1a1716333255449ea880d2a7b90ef857/FLAG72b00f1b5 [2022-07-13 11:22:47,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c067174b9/1a1716333255449ea880d2a7b90ef857 [2022-07-13 11:22:47,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:22:47,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:22:47,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:22:47,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:22:47,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:22:47,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:47,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9ad3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47, skipping insertion in model container [2022-07-13 11:22:47,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:47,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:22:47,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:22:47,891 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/bitvector/byte_add-1.i[1166,1179] [2022-07-13 11:22:47,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:22:47,932 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:22:47,942 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/bitvector/byte_add-1.i[1166,1179] [2022-07-13 11:22:47,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:22:47,970 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:22:47,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47 WrapperNode [2022-07-13 11:22:47,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:22:47,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:22:47,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:22:47,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:22:47,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:47,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,040 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 146 [2022-07-13 11:22:48,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:22:48,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:22:48,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:22:48,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:22:48,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:22:48,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:22:48,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:22:48,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:22:48,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (1/1) ... [2022-07-13 11:22:48,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:22:48,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:22:48,117 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) [2022-07-13 11:22:48,141 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 [2022-07-13 11:22:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:22:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:22:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:22:48,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:22:48,222 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:22:48,224 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:22:48,766 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:22:48,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:22:48,773 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:22:48,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:22:48 BoogieIcfgContainer [2022-07-13 11:22:48,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:22:48,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:22:48,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:22:48,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:22:48,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:22:47" (1/3) ... [2022-07-13 11:22:48,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d2dc1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:22:48, skipping insertion in model container [2022-07-13 11:22:48,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:22:47" (2/3) ... [2022-07-13 11:22:48,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d2dc1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:22:48, skipping insertion in model container [2022-07-13 11:22:48,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:22:48" (3/3) ... [2022-07-13 11:22:48,783 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2022-07-13 11:22:48,796 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:22:48,796 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:22:48,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:22:48,871 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@f09ebc1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58324d90 [2022-07-13 11:22:48,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:22:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 50 states have internal predecessors, (88), 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) [2022-07-13 11:22:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 11:22:48,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:48,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:22:48,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1979526715, now seen corresponding path program 1 times [2022-07-13 11:22:48,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643010527] [2022-07-13 11:22:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:22:49,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643010527] [2022-07-13 11:22:49,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643010527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:49,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:49,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:22:49,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073930488] [2022-07-13 11:22:49,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:22:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:22:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:22:49,084 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 50 states have internal predecessors, (88), 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) [2022-07-13 11:22:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:49,100 INFO L93 Difference]: Finished difference Result 92 states and 160 transitions. [2022-07-13 11:22:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:22:49,102 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 [2022-07-13 11:22:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:49,109 INFO L225 Difference]: With dead ends: 92 [2022-07-13 11:22:49,110 INFO L226 Difference]: Without dead ends: 47 [2022-07-13 11:22:49,113 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 [2022-07-13 11:22:49,116 INFO L413 NwaCegarLoop]: 82 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, 82 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 [2022-07-13 11:22:49,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:22:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-13 11:22:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-13 11:22:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 46 states have internal predecessors, (78), 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) [2022-07-13 11:22:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2022-07-13 11:22:49,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 13 [2022-07-13 11:22:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:49,160 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2022-07-13 11:22:49,160 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) [2022-07-13 11:22:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2022-07-13 11:22:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 11:22:49,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:49,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:22:49,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:22:49,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 726479629, now seen corresponding path program 1 times [2022-07-13 11:22:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:49,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384988443] [2022-07-13 11:22:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:49,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:22:49,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384988443] [2022-07-13 11:22:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384988443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:22:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476781943] [2022-07-13 11:22:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:22:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:22:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:22:49,334 INFO L87 Difference]: Start difference. First operand 47 states and 78 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) [2022-07-13 11:22:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:49,434 INFO L93 Difference]: Finished difference Result 112 states and 190 transitions. [2022-07-13 11:22:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:22:49,435 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 [2022-07-13 11:22:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:49,436 INFO L225 Difference]: With dead ends: 112 [2022-07-13 11:22:49,437 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 11:22:49,437 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 [2022-07-13 11:22:49,438 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 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 [2022-07-13 11:22:49,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:22:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 11:22:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-13 11:22:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 72 states have internal predecessors, (109), 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) [2022-07-13 11:22:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 109 transitions. [2022-07-13 11:22:49,446 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 109 transitions. Word has length 13 [2022-07-13 11:22:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:49,447 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 109 transitions. [2022-07-13 11:22:49,447 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) [2022-07-13 11:22:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 109 transitions. [2022-07-13 11:22:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 11:22:49,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:49,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:22:49,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:22:49,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash 727939832, now seen corresponding path program 1 times [2022-07-13 11:22:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885660466] [2022-07-13 11:22:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:49,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:22:49,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885660466] [2022-07-13 11:22:49,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885660466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:49,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:49,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:22:49,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915814471] [2022-07-13 11:22:49,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:49,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:22:49,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:22:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:22:49,545 INFO L87 Difference]: Start difference. First operand 73 states and 109 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) [2022-07-13 11:22:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:49,751 INFO L93 Difference]: Finished difference Result 184 states and 301 transitions. [2022-07-13 11:22:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:22:49,752 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 [2022-07-13 11:22:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:49,753 INFO L225 Difference]: With dead ends: 184 [2022-07-13 11:22:49,753 INFO L226 Difference]: Without dead ends: 147 [2022-07-13 11:22:49,754 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 [2022-07-13 11:22:49,755 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 116 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 121 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 [2022-07-13 11:22:49,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 121 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:22:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-13 11:22:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2022-07-13 11:22:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.5) internal successors, (150), 100 states have internal predecessors, (150), 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) [2022-07-13 11:22:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 150 transitions. [2022-07-13 11:22:49,781 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 150 transitions. Word has length 19 [2022-07-13 11:22:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:49,782 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 150 transitions. [2022-07-13 11:22:49,782 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) [2022-07-13 11:22:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 150 transitions. [2022-07-13 11:22:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 11:22:49,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:49,783 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] [2022-07-13 11:22:49,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:22:49,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -302552601, now seen corresponding path program 1 times [2022-07-13 11:22:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:49,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298162994] [2022-07-13 11:22:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 11:22:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298162994] [2022-07-13 11:22:49,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298162994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:49,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:49,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:22:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917015286] [2022-07-13 11:22:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:49,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:22:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:22:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:22:49,931 INFO L87 Difference]: Start difference. First operand 101 states and 150 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) [2022-07-13 11:22:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:50,094 INFO L93 Difference]: Finished difference Result 302 states and 441 transitions. [2022-07-13 11:22:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:22:50,094 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 [2022-07-13 11:22:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:50,097 INFO L225 Difference]: With dead ends: 302 [2022-07-13 11:22:50,100 INFO L226 Difference]: Without dead ends: 214 [2022-07-13 11:22:50,101 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 [2022-07-13 11:22:50,103 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 116 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:22:50,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 234 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:22:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-13 11:22:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 108. [2022-07-13 11:22:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 107 states have internal predecessors, (160), 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) [2022-07-13 11:22:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2022-07-13 11:22:50,131 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 25 [2022-07-13 11:22:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:50,131 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2022-07-13 11:22:50,132 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) [2022-07-13 11:22:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2022-07-13 11:22:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:22:50,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:50,134 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] [2022-07-13 11:22:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:22:50,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1128243813, now seen corresponding path program 1 times [2022-07-13 11:22:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:50,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771811200] [2022-07-13 11:22:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 11:22:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:50,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771811200] [2022-07-13 11:22:50,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771811200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:50,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:50,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:22:50,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720683746] [2022-07-13 11:22:50,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:50,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:22:50,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:22:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:22:50,269 INFO L87 Difference]: Start difference. First operand 108 states and 160 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) [2022-07-13 11:22:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:50,420 INFO L93 Difference]: Finished difference Result 308 states and 447 transitions. [2022-07-13 11:22:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:22:50,421 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 [2022-07-13 11:22:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:50,422 INFO L225 Difference]: With dead ends: 308 [2022-07-13 11:22:50,422 INFO L226 Difference]: Without dead ends: 220 [2022-07-13 11:22:50,423 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 [2022-07-13 11:22:50,424 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 111 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:22:50,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 226 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:22:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-13 11:22:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 119. [2022-07-13 11:22:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4576271186440677) internal successors, (172), 118 states have internal predecessors, (172), 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) [2022-07-13 11:22:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-07-13 11:22:50,448 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 26 [2022-07-13 11:22:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:50,449 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-07-13 11:22:50,449 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) [2022-07-13 11:22:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-07-13 11:22:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 11:22:50,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:50,455 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] [2022-07-13 11:22:50,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:22:50,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1070765944, now seen corresponding path program 1 times [2022-07-13 11:22:50,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:50,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277273007] [2022-07-13 11:22:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:50,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:22:50,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277273007] [2022-07-13 11:22:50,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277273007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:22:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117773430] [2022-07-13 11:22:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:22:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:22:50,579 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) [2022-07-13 11:22:50,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:22:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:22:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:22:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:22:50,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:22:50,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117773430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:50,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:22:50,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-13 11:22:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846507548] [2022-07-13 11:22:50,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:50,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:22:50,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:22:50,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:22:50,820 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-07-13 11:22:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:50,914 INFO L93 Difference]: Finished difference Result 247 states and 368 transitions. [2022-07-13 11:22:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:22:50,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 [2022-07-13 11:22:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:50,915 INFO L225 Difference]: With dead ends: 247 [2022-07-13 11:22:50,915 INFO L226 Difference]: Without dead ends: 161 [2022-07-13 11:22:50,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:22:50,925 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 26 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:22:50,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 162 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 58 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-07-13 11:22:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-13 11:22:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-07-13 11:22:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.4360902255639099) internal successors, (191), 133 states have internal predecessors, (191), 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) [2022-07-13 11:22:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 191 transitions. [2022-07-13 11:22:50,939 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 191 transitions. Word has length 27 [2022-07-13 11:22:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:50,939 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 191 transitions. [2022-07-13 11:22:50,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-07-13 11:22:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 191 transitions. [2022-07-13 11:22:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 11:22:50,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:50,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:22:50,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:22:51,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 11:22:51,162 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash 455700090, now seen corresponding path program 1 times [2022-07-13 11:22:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:51,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617226888] [2022-07-13 11:22:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:51,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:22:51,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617226888] [2022-07-13 11:22:51,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617226888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:51,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:51,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:22:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471172503] [2022-07-13 11:22:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:22:51,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:22:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:22:51,262 INFO L87 Difference]: Start difference. First operand 134 states and 191 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-13 11:22:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:51,421 INFO L93 Difference]: Finished difference Result 362 states and 513 transitions. [2022-07-13 11:22:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:22:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 [2022-07-13 11:22:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:51,422 INFO L225 Difference]: With dead ends: 362 [2022-07-13 11:22:51,423 INFO L226 Difference]: Without dead ends: 261 [2022-07-13 11:22:51,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:22:51,424 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 144 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:22:51,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:22:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-13 11:22:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 156. [2022-07-13 11:22:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.4387096774193548) internal successors, (223), 155 states have internal predecessors, (223), 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) [2022-07-13 11:22:51,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2022-07-13 11:22:51,444 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 33 [2022-07-13 11:22:51,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:51,444 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2022-07-13 11:22:51,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-13 11:22:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2022-07-13 11:22:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 11:22:51,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:51,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:22:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:22:51,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1158074597, now seen corresponding path program 1 times [2022-07-13 11:22:51,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565961395] [2022-07-13 11:22:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:51,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 11:22:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:51,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565961395] [2022-07-13 11:22:51,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565961395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:22:51,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:22:51,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:22:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104038394] [2022-07-13 11:22:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:22:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:22:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:22:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:22:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:22:51,499 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-13 11:22:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:22:51,592 INFO L93 Difference]: Finished difference Result 326 states and 468 transitions. [2022-07-13 11:22:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:22:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 [2022-07-13 11:22:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:22:51,595 INFO L225 Difference]: With dead ends: 326 [2022-07-13 11:22:51,595 INFO L226 Difference]: Without dead ends: 203 [2022-07-13 11:22:51,596 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 [2022-07-13 11:22:51,597 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:22:51,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:22:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-13 11:22:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2022-07-13 11:22:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4597701149425288) internal successors, (254), 174 states have internal predecessors, (254), 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) [2022-07-13 11:22:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 254 transitions. [2022-07-13 11:22:51,612 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 254 transitions. Word has length 33 [2022-07-13 11:22:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:22:51,612 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 254 transitions. [2022-07-13 11:22:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-13 11:22:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 254 transitions. [2022-07-13 11:22:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 11:22:51,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:22:51,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:22:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:22:51,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:22:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:22:51,615 INFO L85 PathProgramCache]: Analyzing trace with hash 348727971, now seen corresponding path program 1 times [2022-07-13 11:22:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:22:51,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387726736] [2022-07-13 11:22:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:22:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:22:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:22:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387726736] [2022-07-13 11:22:51,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387726736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:22:51,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893595543] [2022-07-13 11:22:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:22:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:22:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:22:51,699 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) [2022-07-13 11:22:51,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:22:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:22:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 11:22:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates...