./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/pipeline.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/systemc/pipeline.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c42f0f019aa30bac52b753d657fd0a7a27ad0fcef5ea61d179259276789b8861 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:52:03,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:52:03,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:52:03,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:52:03,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:52:03,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:52:03,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:52:03,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:52:03,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:52:03,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:52:03,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:52:03,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:52:03,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:52:03,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:52:03,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:52:03,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:52:03,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:52:03,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:52:03,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:52:03,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:52:03,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:52:03,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:52:03,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:52:03,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:52:03,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:52:03,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:52:03,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:52:03,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:52:03,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:52:03,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:52:03,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:52:03,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:52:03,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:52:03,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:52:03,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:52:03,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:52:03,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:52:03,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:52:03,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:52:03,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:52:03,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:52:03,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:52:03,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:52:03,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:52:03,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:52:03,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:52:03,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:52:03,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:52:03,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:52:03,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:52:03,703 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:52:03,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:52:03,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:52:03,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:52:03,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:52:03,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:03,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:52:03,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:52:03,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c42f0f019aa30bac52b753d657fd0a7a27ad0fcef5ea61d179259276789b8861 [2021-12-14 14:52:03,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:52:03,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:52:03,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:52:03,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:52:03,944 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:52:03,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/pipeline.cil-2.c [2021-12-14 14:52:03,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c343f3ac/36dee4e2876d46a18fecd6dcbe2e6ca1/FLAG25cd20ae4 [2021-12-14 14:52:04,391 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:52:04,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-2.c [2021-12-14 14:52:04,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c343f3ac/36dee4e2876d46a18fecd6dcbe2e6ca1/FLAG25cd20ae4 [2021-12-14 14:52:04,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c343f3ac/36dee4e2876d46a18fecd6dcbe2e6ca1 [2021-12-14 14:52:04,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:52:04,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:52:04,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:04,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:52:04,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:52:04,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b746896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04, skipping insertion in model container [2021-12-14 14:52:04,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:52:04,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:52:04,585 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/systemc/pipeline.cil-2.c[640,653] [2021-12-14 14:52:04,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:04,639 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:52:04,646 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/systemc/pipeline.cil-2.c[640,653] [2021-12-14 14:52:04,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:04,682 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:52:04,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04 WrapperNode [2021-12-14 14:52:04,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:04,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:04,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:52:04,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:52:04,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,711 INFO L137 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 422 [2021-12-14 14:52:04,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:04,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:52:04,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:52:04,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:52:04,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:52:04,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:52:04,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:52:04,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:52:04,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (1/1) ... [2021-12-14 14:52:04,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:04,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 14:52:04,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 14:52:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:52:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:52:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2021-12-14 14:52:04,830 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2021-12-14 14:52:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:52:04,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:52:04,882 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:52:04,883 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:52:05,186 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:52:05,192 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:52:05,192 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 14:52:05,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:05 BoogieIcfgContainer [2021-12-14 14:52:05,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:52:05,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:52:05,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:52:05,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:52:05,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:04" (1/3) ... [2021-12-14 14:52:05,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb58a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:05, skipping insertion in model container [2021-12-14 14:52:05,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:04" (2/3) ... [2021-12-14 14:52:05,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb58a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:05, skipping insertion in model container [2021-12-14 14:52:05,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:05" (3/3) ... [2021-12-14 14:52:05,211 INFO L111 eAbstractionObserver]: Analyzing ICFG pipeline.cil-2.c [2021-12-14 14:52:05,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:52:05,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:52:05,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:52:05,259 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:52:05,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:52:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 14:52:05,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:05,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:05,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash -827879702, now seen corresponding path program 1 times [2021-12-14 14:52:05,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:05,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275164414] [2021-12-14 14:52:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:05,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:05,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:52:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 14:52:05,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275164414] [2021-12-14 14:52:05,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275164414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:05,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:05,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:52:05,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865315620] [2021-12-14 14:52:05,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:05,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:52:05,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:52:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:52:05,682 INFO L87 Difference]: Start difference. First operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:06,299 INFO L93 Difference]: Finished difference Result 498 states and 888 transitions. [2021-12-14 14:52:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:52:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2021-12-14 14:52:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:06,334 INFO L225 Difference]: With dead ends: 498 [2021-12-14 14:52:06,334 INFO L226 Difference]: Without dead ends: 344 [2021-12-14 14:52:06,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:06,345 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 325 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:06,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 531 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-14 14:52:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 152. [2021-12-14 14:52:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.7551020408163265) internal successors, (258), 148 states have internal predecessors, (258), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 264 transitions. [2021-12-14 14:52:06,405 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 264 transitions. Word has length 94 [2021-12-14 14:52:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:06,405 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 264 transitions. [2021-12-14 14:52:06,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 264 transitions. [2021-12-14 14:52:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:06,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:06,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:06,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:52:06,414 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1071269142, now seen corresponding path program 1 times [2021-12-14 14:52:06,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566722994] [2021-12-14 14:52:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:06,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-14 14:52:06,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566722994] [2021-12-14 14:52:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566722994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:06,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:06,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:06,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664748800] [2021-12-14 14:52:06,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:06,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:06,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:06,595 INFO L87 Difference]: Start difference. First operand 152 states and 264 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:07,090 INFO L93 Difference]: Finished difference Result 553 states and 983 transitions. [2021-12-14 14:52:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:52:07,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:07,093 INFO L225 Difference]: With dead ends: 553 [2021-12-14 14:52:07,093 INFO L226 Difference]: Without dead ends: 404 [2021-12-14 14:52:07,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:07,095 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 465 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:07,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 762 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-14 14:52:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 182. [2021-12-14 14:52:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.7853107344632768) internal successors, (316), 178 states have internal predecessors, (316), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 322 transitions. [2021-12-14 14:52:07,105 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 322 transitions. Word has length 188 [2021-12-14 14:52:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:07,106 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 322 transitions. [2021-12-14 14:52:07,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 322 transitions. [2021-12-14 14:52:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:07,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:07,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:07,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:52:07,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1036829934, now seen corresponding path program 1 times [2021-12-14 14:52:07,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:07,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300011503] [2021-12-14 14:52:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:07,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:07,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:07,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-14 14:52:07,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:07,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300011503] [2021-12-14 14:52:07,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300011503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:07,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:07,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:07,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774306452] [2021-12-14 14:52:07,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:07,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:07,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:07,262 INFO L87 Difference]: Start difference. First operand 182 states and 322 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:07,706 INFO L93 Difference]: Finished difference Result 671 states and 1209 transitions. [2021-12-14 14:52:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:52:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:07,709 INFO L225 Difference]: With dead ends: 671 [2021-12-14 14:52:07,709 INFO L226 Difference]: Without dead ends: 492 [2021-12-14 14:52:07,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:07,715 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 465 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:07,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 759 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 14:52:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-14 14:52:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 226. [2021-12-14 14:52:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.8099547511312217) internal successors, (400), 222 states have internal predecessors, (400), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 406 transitions. [2021-12-14 14:52:07,727 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 406 transitions. Word has length 188 [2021-12-14 14:52:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:07,728 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 406 transitions. [2021-12-14 14:52:07,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 406 transitions. [2021-12-14 14:52:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:07,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:07,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:07,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:52:07,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash -59773682, now seen corresponding path program 1 times [2021-12-14 14:52:07,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:07,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957726824] [2021-12-14 14:52:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:07,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:07,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-14 14:52:07,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957726824] [2021-12-14 14:52:07,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957726824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:07,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:07,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:07,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010955402] [2021-12-14 14:52:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:07,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:07,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:07,905 INFO L87 Difference]: Start difference. First operand 226 states and 406 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:08,530 INFO L93 Difference]: Finished difference Result 1035 states and 1879 transitions. [2021-12-14 14:52:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 14:52:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:08,535 INFO L225 Difference]: With dead ends: 1035 [2021-12-14 14:52:08,535 INFO L226 Difference]: Without dead ends: 812 [2021-12-14 14:52:08,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:08,542 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 784 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:08,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 753 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-12-14 14:52:08,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 350. [2021-12-14 14:52:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.8318840579710145) internal successors, (632), 346 states have internal predecessors, (632), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 638 transitions. [2021-12-14 14:52:08,565 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 638 transitions. Word has length 188 [2021-12-14 14:52:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 638 transitions. [2021-12-14 14:52:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 638 transitions. [2021-12-14 14:52:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:08,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:08,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:08,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:52:08,570 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2092644362, now seen corresponding path program 1 times [2021-12-14 14:52:08,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:08,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986147848] [2021-12-14 14:52:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:08,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-14 14:52:08,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:08,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986147848] [2021-12-14 14:52:08,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986147848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:08,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:08,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:08,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156850352] [2021-12-14 14:52:08,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:08,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:08,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:08,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:08,692 INFO L87 Difference]: Start difference. First operand 350 states and 638 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:09,281 INFO L93 Difference]: Finished difference Result 1267 states and 2337 transitions. [2021-12-14 14:52:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:52:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:09,288 INFO L225 Difference]: With dead ends: 1267 [2021-12-14 14:52:09,288 INFO L226 Difference]: Without dead ends: 920 [2021-12-14 14:52:09,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:09,291 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 823 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:09,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 543 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-12-14 14:52:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 440. [2021-12-14 14:52:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6735632183908047) internal successors, (728), 436 states have internal predecessors, (728), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 734 transitions. [2021-12-14 14:52:09,305 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 734 transitions. Word has length 188 [2021-12-14 14:52:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:09,305 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 734 transitions. [2021-12-14 14:52:09,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 734 transitions. [2021-12-14 14:52:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:09,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:09,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:09,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:52:09,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1371492218, now seen corresponding path program 1 times [2021-12-14 14:52:09,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:09,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371016148] [2021-12-14 14:52:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:09,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 14:52:09,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371016148] [2021-12-14 14:52:09,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371016148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873482491] [2021-12-14 14:52:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:09,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:09,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:09,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:52:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 14:52:09,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:09,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873482491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:09,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:09,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:52:09,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678960033] [2021-12-14 14:52:09,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:09,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:09,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:09,840 INFO L87 Difference]: Start difference. First operand 440 states and 734 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:09,851 INFO L93 Difference]: Finished difference Result 877 states and 1467 transitions. [2021-12-14 14:52:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:09,853 INFO L225 Difference]: With dead ends: 877 [2021-12-14 14:52:09,853 INFO L226 Difference]: Without dead ends: 440 [2021-12-14 14:52:09,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:09,855 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:09,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-14 14:52:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-14 14:52:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6689655172413793) internal successors, (726), 436 states have internal predecessors, (726), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 732 transitions. [2021-12-14 14:52:09,880 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 732 transitions. Word has length 188 [2021-12-14 14:52:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:09,881 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 732 transitions. [2021-12-14 14:52:09,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 732 transitions. [2021-12-14 14:52:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:09,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:09,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:09,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 14:52:10,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 14:52:10,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash 412512002, now seen corresponding path program 1 times [2021-12-14 14:52:10,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856954118] [2021-12-14 14:52:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:10,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 14:52:10,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:10,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856954118] [2021-12-14 14:52:10,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856954118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:10,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921115779] [2021-12-14 14:52:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:10,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:10,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:10,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:52:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:10,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-14 14:52:10,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:10,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921115779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:10,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:10,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:52:10,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718228003] [2021-12-14 14:52:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:10,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:10,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:10,617 INFO L87 Difference]: Start difference. First operand 440 states and 732 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:10,627 INFO L93 Difference]: Finished difference Result 877 states and 1463 transitions. [2021-12-14 14:52:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:10,630 INFO L225 Difference]: With dead ends: 877 [2021-12-14 14:52:10,631 INFO L226 Difference]: Without dead ends: 440 [2021-12-14 14:52:10,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:10,633 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:10,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-14 14:52:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-14 14:52:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.664367816091954) internal successors, (724), 436 states have internal predecessors, (724), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 730 transitions. [2021-12-14 14:52:10,643 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 730 transitions. Word has length 188 [2021-12-14 14:52:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:10,643 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 730 transitions. [2021-12-14 14:52:10,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 730 transitions. [2021-12-14 14:52:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:10,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:10,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:10,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:10,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-14 14:52:10,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash -117932026, now seen corresponding path program 1 times [2021-12-14 14:52:10,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211646273] [2021-12-14 14:52:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:10,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 14:52:10,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211646273] [2021-12-14 14:52:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211646273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645599085] [2021-12-14 14:52:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:10,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:10,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:10,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:10,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:52:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-14 14:52:11,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:11,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645599085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:11,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:11,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:52:11,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744398952] [2021-12-14 14:52:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:11,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:11,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:11,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:11,342 INFO L87 Difference]: Start difference. First operand 440 states and 730 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:11,354 INFO L93 Difference]: Finished difference Result 877 states and 1459 transitions. [2021-12-14 14:52:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:11,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:11,356 INFO L225 Difference]: With dead ends: 877 [2021-12-14 14:52:11,356 INFO L226 Difference]: Without dead ends: 440 [2021-12-14 14:52:11,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:11,359 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:11,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-14 14:52:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-14 14:52:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6597701149425288) internal successors, (722), 436 states have internal predecessors, (722), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 728 transitions. [2021-12-14 14:52:11,370 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 728 transitions. Word has length 188 [2021-12-14 14:52:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:11,370 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 728 transitions. [2021-12-14 14:52:11,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 728 transitions. [2021-12-14 14:52:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:11,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:11,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:11,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:11,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:11,590 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash 618172290, now seen corresponding path program 1 times [2021-12-14 14:52:11,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158899698] [2021-12-14 14:52:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:11,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:11,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:11,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 14:52:11,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158899698] [2021-12-14 14:52:11,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158899698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373543301] [2021-12-14 14:52:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:11,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:11,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:11,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:11,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:52:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 14:52:12,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373543301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:12,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:12,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:52:12,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724697831] [2021-12-14 14:52:12,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:12,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:12,057 INFO L87 Difference]: Start difference. First operand 440 states and 728 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:12,066 INFO L93 Difference]: Finished difference Result 877 states and 1455 transitions. [2021-12-14 14:52:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:12,069 INFO L225 Difference]: With dead ends: 877 [2021-12-14 14:52:12,069 INFO L226 Difference]: Without dead ends: 440 [2021-12-14 14:52:12,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:12,072 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:12,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-14 14:52:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-14 14:52:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6551724137931034) internal successors, (720), 436 states have internal predecessors, (720), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:52:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 726 transitions. [2021-12-14 14:52:12,081 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 726 transitions. Word has length 188 [2021-12-14 14:52:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:12,081 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 726 transitions. [2021-12-14 14:52:12,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 726 transitions. [2021-12-14 14:52:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:12,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:12,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:12,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:12,300 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1962569606, now seen corresponding path program 1 times [2021-12-14 14:52:12,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567415693] [2021-12-14 14:52:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:12,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:12,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:12,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:52:12,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:12,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567415693] [2021-12-14 14:52:12,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567415693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:12,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315772375] [2021-12-14 14:52:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:12,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:12,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:12,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:52:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:12,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 14:52:12,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:12,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315772375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:12,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:12,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:12,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862100254] [2021-12-14 14:52:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:12,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:12,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:12,768 INFO L87 Difference]: Start difference. First operand 440 states and 726 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:12,795 INFO L93 Difference]: Finished difference Result 1314 states and 2180 transitions. [2021-12-14 14:52:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:12,799 INFO L225 Difference]: With dead ends: 1314 [2021-12-14 14:52:12,799 INFO L226 Difference]: Without dead ends: 877 [2021-12-14 14:52:12,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:12,801 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:12,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-12-14 14:52:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 875. [2021-12-14 14:52:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 867 states have (on average 1.6262975778546713) internal successors, (1410), 868 states have internal predecessors, (1410), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 14:52:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1425 transitions. [2021-12-14 14:52:12,828 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1425 transitions. Word has length 188 [2021-12-14 14:52:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:12,828 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1425 transitions. [2021-12-14 14:52:12,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1425 transitions. [2021-12-14 14:52:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:12,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:12,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:12,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:13,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 14:52:13,046 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash -235127422, now seen corresponding path program 1 times [2021-12-14 14:52:13,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:13,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866601536] [2021-12-14 14:52:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:13,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 14:52:13,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866601536] [2021-12-14 14:52:13,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866601536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958756672] [2021-12-14 14:52:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:13,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:13,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:13,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:52:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:52:13,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:13,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958756672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:13,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:13,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:13,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339282543] [2021-12-14 14:52:13,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:13,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:13,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:13,541 INFO L87 Difference]: Start difference. First operand 875 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:13,601 INFO L93 Difference]: Finished difference Result 2401 states and 3973 transitions. [2021-12-14 14:52:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:13,617 INFO L225 Difference]: With dead ends: 2401 [2021-12-14 14:52:13,617 INFO L226 Difference]: Without dead ends: 1529 [2021-12-14 14:52:13,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:13,624 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:13,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-12-14 14:52:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2021-12-14 14:52:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1513 states have (on average 1.6252478519497686) internal successors, (2459), 1514 states have internal predecessors, (2459), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (36), 8 states have call predecessors, (36), 9 states have call successors, (36) [2021-12-14 14:52:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2504 transitions. [2021-12-14 14:52:13,662 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2504 transitions. Word has length 188 [2021-12-14 14:52:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:13,662 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 2504 transitions. [2021-12-14 14:52:13,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2504 transitions. [2021-12-14 14:52:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:13,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:13,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:13,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:13,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:13,883 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash -415896190, now seen corresponding path program 1 times [2021-12-14 14:52:13,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:13,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550064443] [2021-12-14 14:52:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:13,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-14 14:52:13,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550064443] [2021-12-14 14:52:13,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550064443] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783685604] [2021-12-14 14:52:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:13,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:14,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 14:52:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 14:52:14,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:14,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783685604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:14,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:14,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:14,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746811395] [2021-12-14 14:52:14,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:14,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:14,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:14,338 INFO L87 Difference]: Start difference. First operand 1527 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:14,401 INFO L93 Difference]: Finished difference Result 4575 states and 7634 transitions. [2021-12-14 14:52:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:14,444 INFO L225 Difference]: With dead ends: 4575 [2021-12-14 14:52:14,445 INFO L226 Difference]: Without dead ends: 3051 [2021-12-14 14:52:14,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:14,462 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:14,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-12-14 14:52:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3049. [2021-12-14 14:52:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3023 states have (on average 1.6040357260999007) internal successors, (4849), 3024 states have internal predecessors, (4849), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (136), 16 states have call predecessors, (136), 17 states have call successors, (136) [2021-12-14 14:52:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 5002 transitions. [2021-12-14 14:52:14,543 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 5002 transitions. Word has length 188 [2021-12-14 14:52:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:14,544 INFO L470 AbstractCegarLoop]: Abstraction has 3049 states and 5002 transitions. [2021-12-14 14:52:14,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 5002 transitions. [2021-12-14 14:52:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:14,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:14,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:14,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 14:52:14,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:14,807 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1945748094, now seen corresponding path program 1 times [2021-12-14 14:52:14,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:14,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404039261] [2021-12-14 14:52:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:14,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:14,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 14:52:14,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404039261] [2021-12-14 14:52:14,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404039261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:14,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920478871] [2021-12-14 14:52:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:14,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:14,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:14,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 14:52:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 14:52:15,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:15,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920478871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:15,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:15,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:52:15,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569636087] [2021-12-14 14:52:15,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:15,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:15,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:15,249 INFO L87 Difference]: Start difference. First operand 3049 states and 5002 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:15,437 INFO L93 Difference]: Finished difference Result 9141 states and 15512 transitions. [2021-12-14 14:52:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:15,498 INFO L225 Difference]: With dead ends: 9141 [2021-12-14 14:52:15,499 INFO L226 Difference]: Without dead ends: 6095 [2021-12-14 14:52:15,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:15,550 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 212 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:15,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2021-12-14 14:52:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6093. [2021-12-14 14:52:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6093 states, 6043 states have (on average 1.582492139665729) internal successors, (9563), 6044 states have internal predecessors, (9563), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (528), 32 states have call predecessors, (528), 33 states have call successors, (528) [2021-12-14 14:52:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 10124 transitions. [2021-12-14 14:52:15,752 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 10124 transitions. Word has length 188 [2021-12-14 14:52:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:15,752 INFO L470 AbstractCegarLoop]: Abstraction has 6093 states and 10124 transitions. [2021-12-14 14:52:15,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 10124 transitions. [2021-12-14 14:52:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:15,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:15,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:15,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 14:52:16,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 14:52:16,036 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash 307905662, now seen corresponding path program 1 times [2021-12-14 14:52:16,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:16,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517499290] [2021-12-14 14:52:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:16,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:16,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 14:52:16,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:16,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517499290] [2021-12-14 14:52:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517499290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:16,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157966867] [2021-12-14 14:52:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:16,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:16,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:16,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 14:52:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 14:52:16,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:16,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157966867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:16,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:16,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:16,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447256675] [2021-12-14 14:52:16,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:16,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:16,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:16,543 INFO L87 Difference]: Start difference. First operand 6093 states and 10124 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:17,040 INFO L93 Difference]: Finished difference Result 18273 states and 32414 transitions. [2021-12-14 14:52:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:17,214 INFO L225 Difference]: With dead ends: 18273 [2021-12-14 14:52:17,214 INFO L226 Difference]: Without dead ends: 12183 [2021-12-14 14:52:17,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:17,351 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:17,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2021-12-14 14:52:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 12181. [2021-12-14 14:52:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12083 states have (on average 1.560787883803691) internal successors, (18859), 12084 states have internal predecessors, (18859), 65 states have call successors, (65), 32 states have call predecessors, (65), 32 states have return successors, (2080), 64 states have call predecessors, (2080), 65 states have call successors, (2080) [2021-12-14 14:52:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 21004 transitions. [2021-12-14 14:52:17,919 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 21004 transitions. Word has length 188 [2021-12-14 14:52:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:17,920 INFO L470 AbstractCegarLoop]: Abstraction has 12181 states and 21004 transitions. [2021-12-14 14:52:17,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 21004 transitions. [2021-12-14 14:52:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:18,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:18,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:18,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:18,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 14:52:18,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -342727814, now seen corresponding path program 1 times [2021-12-14 14:52:18,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384207089] [2021-12-14 14:52:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:18,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:18,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:18,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 14:52:18,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384207089] [2021-12-14 14:52:18,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384207089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287754831] [2021-12-14 14:52:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:18,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:18,532 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:18,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 14:52:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 14:52:18,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:18,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287754831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:18,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:18,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:18,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175146058] [2021-12-14 14:52:18,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:18,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:18,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:18,882 INFO L87 Difference]: Start difference. First operand 12181 states and 21004 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:21,120 INFO L93 Difference]: Finished difference Result 36537 states and 71198 transitions. [2021-12-14 14:52:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:21,711 INFO L225 Difference]: With dead ends: 36537 [2021-12-14 14:52:21,712 INFO L226 Difference]: Without dead ends: 24359 [2021-12-14 14:52:22,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:22,110 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:22,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24359 states. [2021-12-14 14:52:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24359 to 24357. [2021-12-14 14:52:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24357 states, 24163 states have (on average 1.5390059181393039) internal successors, (37187), 24164 states have internal predecessors, (37187), 129 states have call successors, (129), 64 states have call predecessors, (129), 64 states have return successors, (8256), 128 states have call predecessors, (8256), 129 states have call successors, (8256) [2021-12-14 14:52:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24357 states to 24357 states and 45572 transitions. [2021-12-14 14:52:24,015 INFO L78 Accepts]: Start accepts. Automaton has 24357 states and 45572 transitions. Word has length 188 [2021-12-14 14:52:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:24,015 INFO L470 AbstractCegarLoop]: Abstraction has 24357 states and 45572 transitions. [2021-12-14 14:52:24,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24357 states and 45572 transitions. [2021-12-14 14:52:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:25,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:25,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:25,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:25,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 14:52:25,689 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1629754234, now seen corresponding path program 1 times [2021-12-14 14:52:25,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:25,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307492042] [2021-12-14 14:52:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:25,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 14:52:25,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:25,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307492042] [2021-12-14 14:52:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307492042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379775216] [2021-12-14 14:52:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:25,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:25,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:25,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 14:52:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 14:52:26,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:26,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379775216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:26,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:26,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:26,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28859933] [2021-12-14 14:52:26,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:26,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:26,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:26,157 INFO L87 Difference]: Start difference. First operand 24357 states and 45572 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:33,063 INFO L93 Difference]: Finished difference Result 73065 states and 169478 transitions. [2021-12-14 14:52:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2021-12-14 14:52:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:35,065 INFO L225 Difference]: With dead ends: 73065 [2021-12-14 14:52:35,065 INFO L226 Difference]: Without dead ends: 48711 [2021-12-14 14:52:36,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:36,755 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:36,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48711 states. [2021-12-14 14:52:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48711 to 48709. [2021-12-14 14:52:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48709 states, 48323 states have (on average 1.5171864329615297) internal successors, (73315), 48324 states have internal predecessors, (73315), 257 states have call successors, (257), 128 states have call predecessors, (257), 128 states have return successors, (32896), 256 states have call predecessors, (32896), 257 states have call successors, (32896) [2021-12-14 14:52:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48709 states to 48709 states and 106468 transitions. [2021-12-14 14:52:43,180 INFO L78 Accepts]: Start accepts. Automaton has 48709 states and 106468 transitions. Word has length 188 [2021-12-14 14:52:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:43,180 INFO L470 AbstractCegarLoop]: Abstraction has 48709 states and 106468 transitions. [2021-12-14 14:52:43,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:52:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48709 states and 106468 transitions. [2021-12-14 14:52:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-14 14:52:48,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:48,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:52:48,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:48,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 14:52:48,239 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash 446456698, now seen corresponding path program 1 times [2021-12-14 14:52:48,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111120444] [2021-12-14 14:52:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:48,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:52:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:52:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 14:52:48,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111120444] [2021-12-14 14:52:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111120444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815752086] [2021-12-14 14:52:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:48,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:48,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 14:52:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 14:52:48,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:48,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815752086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:48,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:48,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-12-14 14:52:48,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399306238] [2021-12-14 14:52:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:48,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:48,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:48,719 INFO L87 Difference]: Start difference. First operand 48709 states and 106468 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)